57986649 has 18 divisors (see below), whose sum is σ = 97434090. Its totient is φ = 33134976.

The previous prime is 57986639. The next prime is 57986671. The reversal of 57986649 is 94668975.

57986649 is a `hidden beast` number, since 579 + 8 + 6 + 64 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 37601424 + 20385225 = 6132^2 + 4515^2 .

It is not a de Polignac number, because 57986649 - 2⁷ = 57986521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 57986595 and 57986604.

It is not an unprimeable number, because it can be changed into a prime (57986629) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 65304 + ... + 66185.

It is an arithmetic number, because the mean of its divisors is an integer number (5413005).

Almost surely, 2^57986649 is an apocalyptic number.

It is an amenable number.

57986649 is a deficient number, since it is larger than the sum of its proper divisors (39447441).

57986649 is a wasteful number, since it uses less digits than its factorization.

57986649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131509 (or 131499 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 57986649 is about 7614.8965193232. The cubic root of 57986649 is about 387.0579605915.

The spelling of 57986649 in words is "fifty-seven million, nine hundred eighty-six thousand, six hundred forty-nine".