57544540 has 24 divisors (see below), whose sum is σ = 127204560. Its totient is φ = 21806208.

The previous prime is 57544523. The next prime is 57544549. The reversal of 57544540 is 4544575.

It is a super-2 number, since 2×57544540² = 6622748167623200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 57544496 and 57544505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57544549) 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, 75337 + ... + 76096.

It is an arithmetic number, because the mean of its divisors is an integer number (5300190).

Almost surely, 2^57544540 is an apocalyptic number.

It is an amenable number.

57544540 is an abundant number, since it is smaller than the sum of its proper divisors (69660020).

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

57544540 is a wasteful number, since it uses less digits than its factorization.

57544540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151461 (or 151459 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 34.

The square root of 57544540 is about 7585.8117561669. The cubic root of 57544540 is about 386.0717648700.

The spelling of 57544540 in words is "fifty-seven million, five hundred forty-four thousand, five hundred forty".