76398640 has 40 divisors (see below), whose sum is σ = 185354208. Its totient is φ = 29230080.

The previous prime is 76398593. The next prime is 76398653. The reversal of 76398640 is 4689367.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

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, 18921 + ... + 22600.

Almost surely, 2^76398640 is an apocalyptic number.

It is an amenable number.

76398640 is an abundant number, since it is smaller than the sum of its proper divisors (108955568).

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

76398640 is a wasteful number, since it uses less digits than its factorization.

76398640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41557 (or 41551 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 76398640 is about 8740.6315561291. The cubic root of 76398640 is about 424.3216676175.

The spelling of 76398640 in words is "seventy-six million, three hundred ninety-eight thousand, six hundred forty".