78700512 has 48 divisors (see below), whose sum is σ = 225372672. Its totient is φ = 23848320.

The previous prime is 78700499. The next prime is 78700529. The reversal of 78700512 is 21500787.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 78700512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36208 + ... + 38319.

It is an arithmetic number, because the mean of its divisors is an integer number (4695264).

Almost surely, 2^78700512 is an apocalyptic number.

It is an amenable number.

78700512 is an abundant number, since it is smaller than the sum of its proper divisors (146672160).

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

78700512 is a wasteful number, since it uses less digits than its factorization.

78700512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74551 (or 74543 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 78700512 is about 8871.3309035341. The cubic root of 78700512 is about 428.5411386847.

The spelling of 78700512 in words is "seventy-eight million, seven hundred thousand, five hundred twelve".