78878156 has 12 divisors (see below), whose sum is σ = 157756368. Its totient is φ = 33804912.

The previous prime is 78878143. The next prime is 78878263. The reversal of 78878156 is 65187887.

78878156 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1408511 + ... + 1408566.

It is an arithmetic number, because the mean of its divisors is an integer number (13146364).

Almost surely, 2^78878156 is an apocalyptic number.

It is an amenable number.

78878156 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78878156 is a wasteful number, since it uses less digits than its factorization.

78878156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2817088 (or 2817086 counting only the distinct ones).

The product of its digits is 752640, while the sum is 50.

The square root of 78878156 is about 8881.3375118841. The cubic root of 78878156 is about 428.8633329242.

The spelling of 78878156 in words is "seventy-eight million, eight hundred seventy-eight thousand, one hundred fifty-six".