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57272891 = 1314293083
BaseRepresentation
bin1101101001111…
…0101000111011
310222202202122012
43122132220323
5104130213031
65403320135
71263545234
oct332365073
9128682565
1057272891
112a368a75
121722004b
13bb338b0
14786c08b
155064b2b
hex369ea3b

57272891 has 8 divisors (see below), whose sum is σ = 61741680. Its totient is φ = 52813152.

The previous prime is 57272879. The next prime is 57272899. The reversal of 57272891 is 19827275.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57272891 - 222 = 53078587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57272899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17036 + ... + 20118.

It is an arithmetic number, because the mean of its divisors is an integer number (7717710).

Almost surely, 257272891 is an apocalyptic number.

57272891 is a deficient number, since it is larger than the sum of its proper divisors (4468789).

57272891 is a wasteful number, since it uses less digits than its factorization.

57272891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4525.

The product of its digits is 70560, while the sum is 41.

The square root of 57272891 is about 7567.8855038908. The cubic root of 57272891 is about 385.4633001254.

The spelling of 57272891 in words is "fifty-seven million, two hundred seventy-two thousand, eight hundred ninety-one".

Divisors: 1 13 1429 3083 18577 40079 4405607 57272891