78885620 has 24 divisors (see below), whose sum is σ = 180720288. Its totient is φ = 28685600.

The previous prime is 78885617. The next prime is 78885637. The reversal of 78885620 is 2658887.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 179066 + ... + 179505.

It is an arithmetic number, because the mean of its divisors is an integer number (7530012).

Almost surely, 2^78885620 is an apocalyptic number.

It is an amenable number.

78885620 is an abundant number, since it is smaller than the sum of its proper divisors (101834668).

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

78885620 is a wasteful number, since it uses less digits than its factorization.

78885620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358591 (or 358589 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

The square root of 78885620 is about 8881.7577089223. The cubic root of 78885620 is about 428.8768598418.

The spelling of 78885620 in words is "seventy-eight million, eight hundred eighty-five thousand, six hundred twenty".