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61642630 = 2571137793
BaseRepresentation
bin1110101100100…
…1011110000110
311021222202210101
43223021132012
5111240031010
610041114314
71345645060
oct353113606
9137882711
1061642630
1131883025
121878899a
13ca0383a
148288730
15562973a
hex3ac9786

61642630 has 32 divisors (see below), whose sum is σ = 127946304. Its totient is φ = 20944896.

The previous prime is 61642597. The next prime is 61642643. The reversal of 61642630 is 3624616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4014 + ... + 11806.

It is an arithmetic number, because the mean of its divisors is an integer number (3998322).

Almost surely, 261642630 is an apocalyptic number.

61642630 is an abundant number, since it is smaller than the sum of its proper divisors (66303674).

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

61642630 is a wasteful number, since it uses less digits than its factorization.

61642630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7920.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 61642630 is about 7851.2820609121. The cubic root of 61642630 is about 395.0272480269.

The spelling of 61642630 in words is "sixty-one million, six hundred forty-two thousand, six hundred thirty".

Divisors: 1 2 5 7 10 14 35 70 113 226 565 791 1130 1582 3955 7793 7910 15586 38965 54551 77930 109102 272755 545510 880609 1761218 4403045 6164263 8806090 12328526 30821315 61642630