78913538 has 48 divisors (see below), whose sum is σ = 137179392. Its totient is φ = 33976800.

The previous prime is 78913501. The next prime is 78913543. The reversal of 78913538 is 83531987.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 502556 + ... + 502712.

It is an arithmetic number, because the mean of its divisors is an integer number (2857904).

Almost surely, 2^78913538 is an apocalyptic number.

78913538 is a deficient number, since it is larger than the sum of its proper divisors (58265854).

78913538 is a wasteful number, since it uses less digits than its factorization.

78913538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 268 counting only the distinct ones).

The product of its digits is 181440, while the sum is 44.

The square root of 78913538 is about 8883.3292182605. The cubic root of 78913538 is about 428.9274477351.

The spelling of 78913538 in words is "seventy-eight million, nine hundred thirteen thousand, five hundred thirty-eight".