57292440 has 64 divisors (see below), whose sum is σ = 173028960. Its totient is φ = 15175680.

The previous prime is 57292423. The next prime is 57292489. The reversal of 57292440 is 4429275.

57292440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17320 + ... + 20360.

Almost surely, 2^57292440 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 57292440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86514480).

57292440 is an abundant number, since it is smaller than the sum of its proper divisors (115736520).

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

57292440 is a wasteful number, since it uses less digits than its factorization.

57292440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3212 (or 3208 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 57292440 is about 7569.1769697900. The cubic root of 57292440 is about 385.5071519648.

The spelling of 57292440 in words is "fifty-seven million, two hundred ninety-two thousand, four hundred forty".