76721104 has 20 divisors (see below), whose sum is σ = 151453476. Its totient is φ = 37636352.

The previous prime is 76721101. The next prime is 76721129. The reversal of 76721104 is 40112767.

It can be written as a sum of positive squares in 2 ways, for example, as 58675600 + 18045504 = 7660^2 + 4248^2 .

It is a super-2 number, since 2×76721104² = 11772255597957632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76721101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44389 + ... + 46084.

Almost surely, 2^76721104 is an apocalyptic number.

It is an amenable number.

76721104 is a deficient number, since it is larger than the sum of its proper divisors (74732372).

76721104 is a wasteful number, since it uses less digits than its factorization.

76721104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90534 (or 90528 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 76721104 is about 8759.0583968826. The cubic root of 76721104 is about 424.9178230965.

The spelling of 76721104 in words is "seventy-six million, seven hundred twenty-one thousand, one hundred four".