57158740 has 12 divisors (see below), whose sum is σ = 120033396. Its totient is φ = 22863488.

The previous prime is 57158711. The next prime is 57158741. The reversal of 57158740 is 4785175.

It can be written as a sum of positive squares in 2 ways, for example, as 15968016 + 41190724 = 3996^2 + 6418^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 57158740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57158741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1428949 + ... + 1428988.

It is an arithmetic number, because the mean of its divisors is an integer number (10002783).

Almost surely, 2^57158740 is an apocalyptic number.

It is an amenable number.

57158740 is an abundant number, since it is smaller than the sum of its proper divisors (62874656).

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

57158740 is a wasteful number, since it uses less digits than its factorization.

57158740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857946 (or 2857944 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 57158740 is about 7560.3399394472. The cubic root of 57158740 is about 385.2070399313.

The spelling of 57158740 in words is "fifty-seven million, one hundred fifty-eight thousand, seven hundred forty".