76728404 has 6 divisors (see below), whose sum is σ = 134274714. Its totient is φ = 38364200.

The previous prime is 76728401. The next prime is 76728427. The reversal of 76728404 is 40482767.

It can be written as a sum of positive squares in only one way, i.e., 40704400 + 36024004 = 6380^2 + 6002^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76728401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9591047 + ... + 9591054.

It is an arithmetic number, because the mean of its divisors is an integer number (22379119).

Almost surely, 2^76728404 is an apocalyptic number.

It is an amenable number.

76728404 is a deficient number, since it is larger than the sum of its proper divisors (57546310).

76728404 is a wasteful number, since it uses less digits than its factorization.

76728404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19182105 (or 19182103 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 38.

The square root of 76728404 is about 8759.4750984291. The cubic root of 76728404 is about 424.9312996220.

The spelling of 76728404 in words is "seventy-six million, seven hundred twenty-eight thousand, four hundred four".