57019986 has 24 divisors (see below), whose sum is σ = 124934940. Its totient is φ = 18792576.

The previous prime is 57019973. The next prime is 57019999. The reversal of 57019986 is 68991075.

It is an interprime number because it is at equal distance from previous prime (57019973) and next prime (57019999).

It can be written as a sum of positive squares in 2 ways, for example, as 46580625 + 10439361 = 6825^2 + 3231^2 .

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, 16195 + ... + 19398.

Almost surely, 2^57019986 is an apocalyptic number.

57019986 is an abundant number, since it is smaller than the sum of its proper divisors (67914954).

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

57019986 is a wasteful number, since it uses less digits than its factorization.

57019986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35690 (or 35687 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 57019986 is about 7551.1579244511. The cubic root of 57019986 is about 384.8950880725.

The spelling of 57019986 in words is "fifty-seven million, nineteen thousand, nine hundred eighty-six".