76728970 has 16 divisors (see below), whose sum is σ = 138215880. Its totient is φ = 30668544.

The previous prime is 76728961. The next prime is 76728979. The reversal of 76728970 is 7982767.

It is an interprime number because it is at equal distance from previous prime (76728961) and next prime (76728979).

It can be written as a sum of positive squares in 4 ways, for example, as 58384881 + 18344089 = 7641^2 + 4283^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 76728970.

It is not an unprimeable number, because it can be changed into a prime (76728979) by changing a digit.

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, 19054 + ... + 22726.

Almost surely, 2^76728970 is an apocalyptic number.

76728970 is a deficient number, since it is larger than the sum of its proper divisors (61486910).

76728970 is a wasteful number, since it uses less digits than its factorization.

76728970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5769.

The product of its (nonzero) digits is 296352, while the sum is 46.

The square root of 76728970 is about 8759.5074062415. The cubic root of 76728970 is about 424.9323444785.

The spelling of 76728970 in words is "seventy-six million, seven hundred twenty-eight thousand, nine hundred seventy".