57389661 has 16 divisors (see below), whose sum is σ = 97168000. Its totient is φ = 32793984.

The previous prime is 57389639. The next prime is 57389663. The reversal of 57389661 is 16698375.

It is a happy number.

It is not a de Polignac number, because 57389661 - 2⁶ = 57389597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57389663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151636 + ... + 152013.

It is an arithmetic number, because the mean of its divisors is an integer number (6073000).

Almost surely, 2^57389661 is an apocalyptic number.

It is an amenable number.

57389661 is a deficient number, since it is larger than the sum of its proper divisors (39778339).

57389661 is a wasteful number, since it uses less digits than its factorization.

57389661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303665 (or 303659 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 57389661 is about 7575.5964121645. The cubic root of 57389661 is about 385.7250877045.

The spelling of 57389661 in words is "fifty-seven million, three hundred eighty-nine thousand, six hundred sixty-one".