78057920 has 28 divisors (see below), whose sum is σ = 185876184. Its totient is φ = 31223040.

The previous prime is 78057919. The next prime is 78057977. The reversal of 78057920 is 2975087.

It is a congruent 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, 121646 + ... + 122285.

Almost surely, 2^78057920 is an apocalyptic number.

It is an amenable number.

78057920 is an abundant number, since it is smaller than the sum of its proper divisors (107818264).

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

78057920 is a wasteful number, since it uses less digits than its factorization.

78057920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243948 (or 243938 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 78057920 is about 8835.0393321139. The cubic root of 78057920 is about 427.3715994353.

The spelling of 78057920 in words is "seventy-eight million, fifty-seven thousand, nine hundred twenty".