78672620 has 24 divisors (see below), whose sum is σ = 177921744. Its totient is φ = 29048256.

The previous prime is 78672613. The next prime is 78672623. The reversal of 78672620 is 2627687.

It is a super-2 number, since 2×78672620² = 12378762275328800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (78672623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151034 + ... + 151553.

It is an arithmetic number, because the mean of its divisors is an integer number (7413406).

Almost surely, 2^78672620 is an apocalyptic number.

It is an amenable number.

78672620 is an abundant number, since it is smaller than the sum of its proper divisors (99249124).

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

78672620 is a wasteful number, since it uses less digits than its factorization.

78672620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302609 (or 302607 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 78672620 is about 8869.7587340356. The cubic root of 78672620 is about 428.4905067321.

The spelling of 78672620 in words is "seventy-eight million, six hundred seventy-two thousand, six hundred twenty".