78407072 has 24 divisors (see below), whose sum is σ = 162489600. Its totient is φ = 37139904.

The previous prime is 78407041. The next prime is 78407083. The reversal of 78407072 is 27070487.

It is a super-2 number, since 2×78407072² = 12295337879226368, 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 3 ways as a sum of consecutive naturals, for example, 63872 + ... + 65087.

It is an arithmetic number, because the mean of its divisors is an integer number (6770400).

Almost surely, 2^78407072 is an apocalyptic number.

It is an amenable number.

78407072 is an abundant number, since it is smaller than the sum of its proper divisors (84082528).

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

78407072 is a wasteful number, since it uses less digits than its factorization.

78407072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128988 (or 128980 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 35.

The square root of 78407072 is about 8854.7767899592. The cubic root of 78407072 is about 428.0078608042.

The spelling of 78407072 in words is "seventy-eight million, four hundred seven thousand, seventy-two".