76720432 has 20 divisors (see below), whose sum is σ = 151084576. Its totient is φ = 37730880.

The previous prime is 76720429. The next prime is 76720447. The reversal of 76720432 is 23402767.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 76720394 and 76720403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38328 + ... + 40279.

Almost surely, 2^76720432 is an apocalyptic number.

It is an amenable number.

76720432 is a deficient number, since it is larger than the sum of its proper divisors (74364144).

76720432 is a wasteful number, since it uses less digits than its factorization.

76720432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78676 (or 78670 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 76720432 is about 8759.0200365109. The cubic root of 76720432 is about 424.9165824748.

The spelling of 76720432 in words is "seventy-six million, seven hundred twenty thousand, four hundred thirty-two".