78908478 has 32 divisors (see below), whose sum is σ = 178104960. Its totient is φ = 23086560.

The previous prime is 78908437. The next prime is 78908497. The reversal of 78908478 is 87480987.

It is a self number, because there is not a number n which added to its sum of digits gives 78908478.

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, 18700 + ... + 22527.

It is an arithmetic number, because the mean of its divisors is an integer number (5565780).

Almost surely, 2^78908478 is an apocalyptic number.

78908478 is an abundant number, since it is smaller than the sum of its proper divisors (99196482).

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

78908478 is a wasteful number, since it uses less digits than its factorization.

78908478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41272.

The product of its (nonzero) digits is 903168, while the sum is 51.

The square root of 78908478 is about 8883.0444105611. The cubic root of 78908478 is about 428.9182798139.

The spelling of 78908478 in words is "seventy-eight million, nine hundred eight thousand, four hundred seventy-eight".