78580857 has 8 divisors (see below), whose sum is σ = 109329984. Its totient is φ = 50109488.

The previous prime is 78580849. The next prime is 78580889. The reversal of 78580857 is 75808587.

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 78580857 - 2³ = 78580849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78580847) 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, 569358 + ... + 569495.

It is an arithmetic number, because the mean of its divisors is an integer number (13666248).

Almost surely, 2^78580857 is an apocalyptic number.

It is an amenable number.

78580857 is a deficient number, since it is larger than the sum of its proper divisors (30749127).

78580857 is a wasteful number, since it uses less digits than its factorization.

78580857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138879.

The product of its (nonzero) digits is 627200, while the sum is 48.

The square root of 78580857 is about 8864.5844234234. The cubic root of 78580857 is about 428.3238461598.

The spelling of 78580857 in words is "seventy-eight million, five hundred eighty thousand, eight hundred fifty-seven".