76704640 has 32 divisors (see below), whose sum is σ = 183373560. Its totient is φ = 30681600.

The previous prime is 76704613. The next prime is 76704643. The reversal of 76704640 is 4640767.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 76704596 and 76704605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76704643) 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, 59286 + ... + 60565.

Almost surely, 2^76704640 is an apocalyptic number.

It is an amenable number.

76704640 is an abundant number, since it is smaller than the sum of its proper divisors (106668920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

76704640 is a wasteful number, since it uses less digits than its factorization.

76704640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119870 (or 119858 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 76704640 is about 8758.1185194081. The cubic root of 76704640 is about 424.8874257779.

The spelling of 76704640 in words is "seventy-six million, seven hundred four thousand, six hundred forty".