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57513988 = 22719108109
BaseRepresentation
bin1101101101100…
…1100000000100
311000020000100201
43123121200010
5104210421423
65412420244
71265601160
oct333314004
9130200321
1057513988
112a513124
1217317684
13bbb955c
1478d1ca0
1550b12ad
hex36d9804

57513988 has 24 divisors (see below), whose sum is σ = 121083200. Its totient is φ = 23351328.

The previous prime is 57513983. The next prime is 57513991. The reversal of 57513988 is 88931575.

It is not an unprimeable number, because it can be changed into a prime (57513983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53523 + ... + 54586.

Almost surely, 257513988 is an apocalyptic number.

It is an amenable number.

57513988 is an abundant number, since it is smaller than the sum of its proper divisors (63569212).

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

57513988 is a wasteful number, since it uses less digits than its factorization.

57513988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108139 (or 108137 counting only the distinct ones).

The product of its digits is 302400, while the sum is 46.

The square root of 57513988 is about 7583.7977293702. The cubic root of 57513988 is about 386.0034273546.

The spelling of 57513988 in words is "fifty-seven million, five hundred thirteen thousand, nine hundred eighty-eight".

Divisors: 1 2 4 7 14 19 28 38 76 133 266 532 108109 216218 432436 756763 1513526 2054071 3027052 4108142 8216284 14378497 28756994 57513988