78628616 has 32 divisors (see below), whose sum is σ = 161196480. Its totient is φ = 35659200.

The previous prime is 78628579. The next prime is 78628619. The reversal of 78628616 is 61682687.

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

It is not an unprimeable number, because it can be changed into a prime (78628619) 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, 56246 + ... + 57626.

It is an arithmetic number, because the mean of its divisors is an integer number (5037390).

Almost surely, 2^78628616 is an apocalyptic number.

It is an amenable number.

78628616 is an abundant number, since it is smaller than the sum of its proper divisors (82567864).

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

78628616 is a wasteful number, since it uses less digits than its factorization.

78628616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045 (or 2041 counting only the distinct ones).

The product of its digits is 193536, while the sum is 44.

The square root of 78628616 is about 8867.2778235488. The cubic root of 78628616 is about 428.4106025553.

The spelling of 78628616 in words is "seventy-eight million, six hundred twenty-eight thousand, six hundred sixteen".