78328512 has 56 divisors (see below), whose sum is σ = 230276400. Its totient is φ = 26108928.

The previous prime is 78328493. The next prime is 78328531. The reversal of 78328512 is 21582387.

It is an interprime number because it is at equal distance from previous prime (78328493) and next prime (78328531).

It is a super-2 number, since 2×78328512² = 12270711584268288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20937 + ... + 24392.

Almost surely, 2^78328512 is an apocalyptic number.

78328512 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

78328512 is an abundant number, since it is smaller than the sum of its proper divisors (151947888).

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

78328512 is a wasteful number, since it uses less digits than its factorization.

78328512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45350 (or 45334 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 78328512 is about 8850.3396544991. The cubic root of 78328512 is about 427.8648654812.

The spelling of 78328512 in words is "seventy-eight million, three hundred twenty-eight thousand, five hundred twelve".