57138246 has 24 divisors (see below), whose sum is σ = 135054504. Its totient is φ = 17314560.

The previous prime is 57138227. The next prime is 57138269. The reversal of 57138246 is 64283175.

57138246 is a `hidden beast` number, since 571 + 3 + 82 + 4 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 57138246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144091 + ... + 144486.

It is an arithmetic number, because the mean of its divisors is an integer number (5627271).

Almost surely, 2^57138246 is an apocalyptic number.

57138246 is an abundant number, since it is smaller than the sum of its proper divisors (77916258).

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

57138246 is a wasteful number, since it uses less digits than its factorization.

57138246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288596 (or 288593 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 57138246 is about 7558.9844555998. The cubic root of 57138246 is about 385.1609963646.

Subtracting 57138246 from its reverse (64283175), we obtain a square (7144929 = 2673²).

The spelling of 57138246 in words is "fifty-seven million, one hundred thirty-eight thousand, two hundred forty-six".