78878544 has 40 divisors (see below), whose sum is σ = 206570112. Its totient is φ = 25931520.

The previous prime is 78878509. The next prime is 78878599. The reversal of 78878544 is 44587887.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7752 + ... + 14759.

Almost surely, 2^78878544 is an apocalyptic number.

It is an amenable number.

78878544 is an abundant number, since it is smaller than the sum of its proper divisors (127691568).

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

78878544 is a wasteful number, since it uses less digits than its factorization.

78878544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22595 (or 22589 counting only the distinct ones).

The product of its digits is 2007040, while the sum is 51.

The square root of 78878544 is about 8881.3593554140. The cubic root of 78878544 is about 428.8640361130.

The spelling of 78878544 in words is "seventy-eight million, eight hundred seventy-eight thousand, five hundred forty-four".