78796640 has 96 divisors (see below), whose sum is σ = 205371936. Its totient is φ = 28385280.

The previous prime is 78796633. The next prime is 78796657. The reversal of 78796640 is 4669787.

It is a happy number.

It is a congruent number.

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, 89000 + ... + 89880.

It is an arithmetic number, because the mean of its divisors is an integer number (2139291).

Almost surely, 2^78796640 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 78796640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102685968).

78796640 is an abundant number, since it is smaller than the sum of its proper divisors (126575296).

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

78796640 is a wasteful number, since it uses less digits than its factorization.

78796640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952 (or 944 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 78796640 is about 8876.7471519696. The cubic root of 78796640 is about 428.7155468750.

The spelling of 78796640 in words is "seventy-eight million, seven hundred ninety-six thousand, six hundred forty".