57427389 has 12 divisors (see below), whose sum is σ = 86557536. Its totient is φ = 36620232.

The previous prime is 57427379. The next prime is 57427393. The reversal of 57427389 is 98372475.

57427389 is a `hidden beast` number, since 574 + 2 + 73 + 8 + 9 = 666.

It is not a de Polignac number, because 57427389 - 2⁷ = 57427261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57427319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138507 + ... + 138920.

It is an arithmetic number, because the mean of its divisors is an integer number (7213128).

Almost surely, 2^57427389 is an apocalyptic number.

It is an amenable number.

57427389 is a deficient number, since it is larger than the sum of its proper divisors (29130147).

57427389 is a wasteful number, since it uses less digits than its factorization.

57427389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277456 (or 277453 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 57427389 is about 7578.0861040239. The cubic root of 57427389 is about 385.8095944958.

It can be divided in two parts, 5742 and 7389, that added together give a palindrome (13131).

The spelling of 57427389 in words is "fifty-seven million, four hundred twenty-seven thousand, three hundred eighty-nine".