57278428 has 12 divisors (see below), whose sum is σ = 101610880. Its totient is φ = 28246752.

The previous prime is 57278401. The next prime is 57278447. The reversal of 57278428 is 82487275.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97788 + ... + 98371.

Almost surely, 2^57278428 is an apocalyptic number.

It is an amenable number.

57278428 is a deficient number, since it is larger than the sum of its proper divisors (44332452).

57278428 is a wasteful number, since it uses less digits than its factorization.

57278428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196236 (or 196234 counting only the distinct ones).

The product of its digits is 250880, while the sum is 43.

The square root of 57278428 is about 7568.2513171802. The cubic root of 57278428 is about 385.4757216014.

The spelling of 57278428 in words is "fifty-seven million, two hundred seventy-eight thousand, four hundred twenty-eight".