78628332 has 24 divisors (see below), whose sum is σ = 194258736. Its totient is φ = 24667648.

The previous prime is 78628331. The next prime is 78628337. The reversal of 78628332 is 23382687.

It is a happy number.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (78628331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192513 + ... + 192920.

It is an arithmetic number, because the mean of its divisors is an integer number (8094114).

Almost surely, 2^78628332 is an apocalyptic number.

It is an amenable number.

78628332 is an abundant number, since it is smaller than the sum of its proper divisors (115630404).

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

78628332 is a wasteful number, since it uses less digits than its factorization.

78628332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385457 (or 385455 counting only the distinct ones).

The product of its digits is 96768, while the sum is 39.

The square root of 78628332 is about 8867.2618096005. The cubic root of 78628332 is about 428.4100867603.

The spelling of 78628332 in words is "seventy-eight million, six hundred twenty-eight thousand, three hundred thirty-two".