78645264 has 80 divisors (see below), whose sum is σ = 222128640. Its totient is φ = 23869440.

The previous prime is 78645251. The next prime is 78645271. The reversal of 78645264 is 46254687.

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, 23742 + ... + 26850.

It is an arithmetic number, because the mean of its divisors is an integer number (2776608).

Almost surely, 2^78645264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78645264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111064320).

78645264 is an abundant number, since it is smaller than the sum of its proper divisors (143483376).

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

78645264 is a wasteful number, since it uses less digits than its factorization.

78645264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3168 (or 3162 counting only the distinct ones).

The product of its digits is 322560, while the sum is 42.

The square root of 78645264 is about 8868.2165061527. The cubic root of 78645264 is about 428.4408361470.

The spelling of 78645264 in words is "seventy-eight million, six hundred forty-five thousand, two hundred sixty-four".