57123456 has 64 divisors (see below), whose sum is σ = 163420320. Its totient is φ = 17574912.

The previous prime is 57123433. The next prime is 57123497. The reversal of 57123456 is 65432175.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

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, 730 + ... + 10713.

Almost surely, 2^57123456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57123456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81710160).

57123456 is an abundant number, since it is smaller than the sum of its proper divisors (106296864).

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

57123456 is a wasteful number, since it uses less digits than its factorization.

57123456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11473 (or 11461 counting only the distinct ones).

The product of its digits is 25200, while the sum is 33.

The square root of 57123456 is about 7558.0060862638. The cubic root of 57123456 is about 385.1277610502.

The spelling of 57123456 in words is "fifty-seven million, one hundred twenty-three thousand, four hundred fifty-six".