57079890 has 80 divisors (see below), whose sum is σ = 175424832. Its totient is φ = 13045536.

The previous prime is 57079889. The next prime is 57079907. The reversal of 57079890 is 9897075.

57079890 is a `hidden beast` number, since 570 + 79 + 8 + 9 + 0 = 666.

It is a super-2 number, since 2×57079890² = 6516227684824200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 637 + ... + 10703.

Almost surely, 2^57079890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57079890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87712416).

57079890 is an abundant number, since it is smaller than the sum of its proper divisors (118344942).

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

57079890 is a wasteful number, since it uses less digits than its factorization.

57079890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10093 (or 10084 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The square root of 57079890 is about 7555.1234271850. The cubic root of 57079890 is about 385.0298284642.

The spelling of 57079890 in words is "fifty-seven million, seventy-nine thousand, eight hundred ninety".