57406239 has 40 divisors (see below), whose sum is σ = 98503680. Its totient is φ = 32950800.

The previous prime is 57406199. The next prime is 57406241. The reversal of 57406239 is 93260475.

It is not a de Polignac number, because 57406239 - 2⁸ = 57405983 is a prime.

It is a super-2 number, since 2×57406239² = 6590952552250242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57406289) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 15234 + ... + 18624.

It is an arithmetic number, because the mean of its divisors is an integer number (2462592).

Almost surely, 2^57406239 is an apocalyptic number.

57406239 is a deficient number, since it is larger than the sum of its proper divisors (41097441).

57406239 is a wasteful number, since it uses less digits than its factorization.

57406239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3433 (or 3424 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 57406239 is about 7576.6905044353. The cubic root of 57406239 is about 385.7622252584.

The spelling of 57406239 in words is "fifty-seven million, four hundred six thousand, two hundred thirty-nine".