57398868 has 90 divisors (see below), whose sum is σ = 159657806. Its totient is φ = 17978112.

The previous prime is 57398843. The next prime is 57398881. The reversal of 57398868 is 86889375.

It is a happy number.

57398868 is a `hidden beast` number, since 573 + 9 + 8 + 8 + 68 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 5817744 + 51581124 = 2412^2 + 7182^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 93330 + ... + 93942.

Almost surely, 2^57398868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57398868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79828903).

57398868 is an abundant number, since it is smaller than the sum of its proper divisors (102258938).

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

57398868 is a wasteful number, since it uses less digits than its factorization.

57398868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663 (or 635 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 57398868 is about 7576.2040627216. The cubic root of 57398868 is about 385.7457138413.

It can be divided in two parts, 573988 and 68, that added together give a triangular number (574056 = T₁₀₇₁).

The spelling of 57398868 in words is "fifty-seven million, three hundred ninety-eight thousand, eight hundred sixty-eight".