57978667 has 8 divisors (see below), whose sum is σ = 59662736. Its totient is φ = 56300832.

The previous prime is 57978659. The next prime is 57978677. The reversal of 57978667 is 76687975.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57978667 - 2³ = 57978659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57978617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22573 + ... + 25009.

It is an arithmetic number, because the mean of its divisors is an integer number (7457842).

Almost surely, 2^57978667 is an apocalyptic number.

57978667 is a deficient number, since it is larger than the sum of its proper divisors (1684069).

57978667 is a wasteful number, since it uses less digits than its factorization.

57978667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3117.

The product of its digits is 4445280, while the sum is 55.

The square root of 57978667 is about 7614.3723969872. The cubic root of 57978667 is about 387.0401999606.

The spelling of 57978667 in words is "fifty-seven million, nine hundred seventy-eight thousand, six hundred sixty-seven".