57078387 has 12 divisors (see below), whose sum is σ = 86031504. Its totient is φ = 36397680.

The previous prime is 57078349. The next prime is 57078397. The reversal of 57078387 is 78387075.

57078387 is a `hidden beast` number, since 570 + 78 + 3 + 8 + 7 = 666.

It is not a de Polignac number, because 57078387 - 2⁶ = 57078323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57078317) 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, 137664 + ... + 138077.

It is an arithmetic number, because the mean of its divisors is an integer number (7169292).

Almost surely, 2^57078387 is an apocalyptic number.

57078387 is a deficient number, since it is larger than the sum of its proper divisors (28953117).

57078387 is a wasteful number, since it uses less digits than its factorization.

57078387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275770 (or 275767 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The square root of 57078387 is about 7555.0239576060. The cubic root of 57078387 is about 385.0264489616.

The spelling of 57078387 in words is "fifty-seven million, seventy-eight thousand, three hundred eighty-seven".