78659970 has 32 divisors (see below), whose sum is σ = 189017280. Its totient is φ = 20950080.

The previous prime is 78659963. The next prime is 78660011. The reversal of 78659970 is 7995687.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46296 + ... + 47964.

It is an arithmetic number, because the mean of its divisors is an integer number (5906790).

Almost surely, 2^78659970 is an apocalyptic number.

78659970 is an abundant number, since it is smaller than the sum of its proper divisors (110357310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78659970 is a wasteful number, since it uses less digits than its factorization.

78659970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3250.

The product of its (nonzero) digits is 952560, while the sum is 51.

The square root of 78659970 is about 8869.0456081813. The cubic root of 78659970 is about 428.4675394216.

The spelling of 78659970 in words is "seventy-eight million, six hundred fifty-nine thousand, nine hundred seventy".