57640390 has 16 divisors (see below), whose sum is σ = 103933008. Its totient is φ = 23016096.

The previous prime is 57640343. The next prime is 57640403. The reversal of 57640390 is 9304675.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1429 + ... + 10831.

It is an arithmetic number, because the mean of its divisors is an integer number (6495813).

Almost surely, 2^57640390 is an apocalyptic number.

57640390 is a deficient number, since it is larger than the sum of its proper divisors (46292618).

57640390 is a wasteful number, since it uses less digits than its factorization.

57640390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10023.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 57640390 is about 7592.1268429868. The cubic root of 57640390 is about 386.2860015388.

The spelling of 57640390 in words is "fifty-seven million, six hundred forty thousand, three hundred ninety".