78644060 has 24 divisors (see below), whose sum is σ = 180166896. Its totient is φ = 28597760.

The previous prime is 78644053. The next prime is 78644087. The reversal of 78644060 is 6044687.

It is a self number, because there is not a number n which added to its sum of digits gives 78644060.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178517 + ... + 178956.

It is an arithmetic number, because the mean of its divisors is an integer number (7506954).

Almost surely, 2^78644060 is an apocalyptic number.

It is an amenable number.

78644060 is an abundant number, since it is smaller than the sum of its proper divisors (101522836).

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

78644060 is a wasteful number, since it uses less digits than its factorization.

78644060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357493 (or 357491 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 78644060 is about 8868.1486230216. The cubic root of 78644060 is about 428.4386497666.

The spelling of 78644060 in words is "seventy-eight million, six hundred forty-four thousand, sixty".