78713220 has 48 divisors (see below), whose sum is σ = 225529920. Its totient is φ = 20501376.

The previous prime is 78713197. The next prime is 78713231. The reversal of 78713220 is 2231787.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12675 + ... + 17834.

It is an arithmetic number, because the mean of its divisors is an integer number (4698540).

Almost surely, 2^78713220 is an apocalyptic number.

It is an amenable number.

78713220 is an abundant number, since it is smaller than the sum of its proper divisors (146816700).

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

78713220 is a wasteful number, since it uses less digits than its factorization.

78713220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30564 (or 30562 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 78713220 is about 8872.0471143925. The cubic root of 78713220 is about 428.5642033703.

The spelling of 78713220 in words is "seventy-eight million, seven hundred thirteen thousand, two hundred twenty".