78749732 has 24 divisors (see below), whose sum is σ = 145265400. Its totient is φ = 37296896.

The previous prime is 78749707. The next prime is 78749747. The reversal of 78749732 is 23794787.

It can be written as a sum of positive squares in 4 ways, for example, as 13366336 + 65383396 = 3656^2 + 8086^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257 + ... + 12552.

It is an arithmetic number, because the mean of its divisors is an integer number (6052725).

Almost surely, 2^78749732 is an apocalyptic number.

It is an amenable number.

78749732 is a deficient number, since it is larger than the sum of its proper divisors (66515668).

78749732 is a wasteful number, since it uses less digits than its factorization.

78749732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12895 (or 12893 counting only the distinct ones).

The product of its digits is 592704, while the sum is 47.

The square root of 78749732 is about 8874.1045745472. The cubic root of 78749732 is about 428.6304578798.

The spelling of 78749732 in words is "seventy-eight million, seven hundred forty-nine thousand, seven hundred thirty-two".