78278832 has 40 divisors (see below), whose sum is σ = 224690480. Its totient is φ = 26092800.

The previous prime is 78278797. The next prime is 78278857. The reversal of 78278832 is 23887287.

It is a super-2 number, since 2×78278832² = 12255151078568448, which contains 22 as substring.

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, 90169 + ... + 91032.

It is an arithmetic number, because the mean of its divisors is an integer number (5617262).

Almost surely, 2^78278832 is an apocalyptic number.

78278832 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

78278832 is an abundant number, since it is smaller than the sum of its proper divisors (146411648).

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

78278832 is a wasteful number, since it uses less digits than its factorization.

78278832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181218 (or 181206 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 78278832 is about 8847.5325373801. The cubic root of 78278832 is about 427.7743883292.

The spelling of 78278832 in words is "seventy-eight million, two hundred seventy-eight thousand, eight hundred thirty-two".