78628744 has 32 divisors (see below), whose sum is σ = 155779200. Its totient is φ = 37145920.

The previous prime is 78628729. The next prime is 78628763. The reversal of 78628744 is 44782687.

It is a junction number, because it is equal to n+sod(n) for n = 78628694 and 78628703.

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, 7299 + ... + 14509.

It is an arithmetic number, because the mean of its divisors is an integer number (4868100).

Almost surely, 2^78628744 is an apocalyptic number.

It is an amenable number.

78628744 is a deficient number, since it is larger than the sum of its proper divisors (77150456).

78628744 is a wasteful number, since it uses less digits than its factorization.

78628744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7293 (or 7289 counting only the distinct ones).

The product of its digits is 602112, while the sum is 46.

The square root of 78628744 is about 8867.2850410935. The cubic root of 78628744 is about 428.4108350259.

The spelling of 78628744 in words is "seventy-eight million, six hundred twenty-eight thousand, seven hundred forty-four".