57921394 has 4 divisors (see below), whose sum is σ = 86882094. Its totient is φ = 28960696.

The previous prime is 57921389. The next prime is 57921403. The reversal of 57921394 is 49312975.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 56445169 + 1476225 = 7513^2 + 1215^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14480347 + ... + 14480350.

Almost surely, 2^57921394 is an apocalyptic number.

57921394 is a deficient number, since it is larger than the sum of its proper divisors (28960700).

57921394 is a wasteful number, since it uses less digits than its factorization.

57921394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28960699.

The product of its digits is 68040, while the sum is 40.

The square root of 57921394 is about 7610.6106193919. The cubic root of 57921394 is about 386.9127148149.

The spelling of 57921394 in words is "fifty-seven million, nine hundred twenty-one thousand, three hundred ninety-four".