57537440 has 48 divisors (see below), whose sum is σ = 139110048. Its totient is φ = 22477056.

The previous prime is 57537439. The next prime is 57537443. The reversal of 57537440 is 4473575.

It is a self number, because there is not a number n which added to its sum of digits gives 57537440.

It is not an unprimeable number, because it can be changed into a prime (57537443) 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, 2699 + ... + 11061.

It is an arithmetic number, because the mean of its divisors is an integer number (2898126).

Almost surely, 2^57537440 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 57537440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69555024).

57537440 is an abundant number, since it is smaller than the sum of its proper divisors (81572608).

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

57537440 is a wasteful number, since it uses less digits than its factorization.

57537440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8421 (or 8413 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 35.

The square root of 57537440 is about 7585.3437628100. The cubic root of 57537440 is about 386.0558860263.

The spelling of 57537440 in words is "fifty-seven million, five hundred thirty-seven thousand, four hundred forty".