57240491 has 16 divisors (see below), whose sum is σ = 74469888. Its totient is φ = 42662400.

The previous prime is 57240487. The next prime is 57240497. The reversal of 57240491 is 19404275.

It is a happy number.

It is not a de Polignac number, because 57240491 - 2² = 57240487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57240497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14390 + ... + 17931.

It is an arithmetic number, because the mean of its divisors is an integer number (4654368).

Almost surely, 2^57240491 is an apocalyptic number.

57240491 is a deficient number, since it is larger than the sum of its proper divisors (17229397).

57240491 is a wasteful number, since it uses less digits than its factorization.

57240491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32362.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 57240491 is about 7565.7445767089. The cubic root of 57240491 is about 385.3905992570.

The spelling of 57240491 in words is "fifty-seven million, two hundred forty thousand, four hundred ninety-one".