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61275620 = 2257439997
BaseRepresentation
bin1110100110111…
…1110111100100
311021022010100102
43221233313210
5111141304440
610025203232
71342556060
oct351576744
9137263312
1061275620
113165230a
1218630518
13c905783
1481d0aa0
1555a5b15
hex3a6fde4

61275620 has 48 divisors (see below), whose sum is σ = 147544320. Its totient is φ = 20939904.

The previous prime is 61275619. The next prime is 61275629. The reversal of 61275620 is 2657216.

It is not an unprimeable number, because it can be changed into a prime (61275629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60962 + ... + 61958.

It is an arithmetic number, because the mean of its divisors is an integer number (3073840).

Almost surely, 261275620 is an apocalyptic number.

It is an amenable number.

61275620 is an abundant number, since it is smaller than the sum of its proper divisors (86268700).

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

61275620 is a wasteful number, since it uses less digits than its factorization.

61275620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452 (or 1450 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 61275620 is about 7827.8745518819. The cubic root of 61275620 is about 394.2417113905.

The spelling of 61275620 in words is "sixty-one million, two hundred seventy-five thousand, six hundred twenty".

Divisors: 1 2 4 5 7 10 14 20 28 35 70 140 439 878 997 1756 1994 2195 3073 3988 4390 4985 6146 6979 8780 9970 12292 13958 15365 19940 27916 30730 34895 61460 69790 139580 437683 875366 1750732 2188415 3063781 4376830 6127562 8753660 12255124 15318905 30637810 61275620