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61250640 = 24351123201
BaseRepresentation
bin1110100110100…
…1110001010000
311021020212002020
43221221301100
5111140010030
610024451440
71342423203
oct351516120
9137225066
1061250640
1131635570
1218619b80
13c8c72a9
1481c593a
15559d510
hex3a69c50

61250640 has 80 divisors (see below), whose sum is σ = 207147456. Its totient is φ = 14848000.

The previous prime is 61250621. The next prime is 61250641. The reversal of 61250640 is 4605216.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 61250640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61250641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8961 + ... + 14240.

Almost surely, 261250640 is an apocalyptic number.

61250640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61250640 is an abundant number, since it is smaller than the sum of its proper divisors (145896816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61250640 is a wasteful number, since it uses less digits than its factorization.

61250640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23228 (or 23222 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 61250640 is about 7826.2788092426. The cubic root of 61250640 is about 394.1881311003.

Adding to 61250640 its reverse (4605216), we get a palindrome (65855856).

The spelling of 61250640 in words is "sixty-one million, two hundred fifty thousand, six hundred forty".

Divisors: 1 2 3 4 5 6 8 10 11 12 15 16 20 22 24 30 33 40 44 48 55 60 66 80 88 110 120 132 165 176 220 240 264 330 440 528 660 880 1320 2640 23201 46402 69603 92804 116005 139206 185608 232010 255211 278412 348015 371216 464020 510422 556824 696030 765633 928040 1020844 1113648 1276055 1392060 1531266 1856080 2041688 2552110 2784120 3062532 3828165 4083376 5104220 5568240 6125064 7656330 10208440 12250128 15312660 20416880 30625320 61250640