76440720 has 40 divisors (see below), whose sum is σ = 236966976. Its totient is φ = 20384128.

The previous prime is 76440703. The next prime is 76440731. The reversal of 76440720 is 2704467.

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

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 159012 + ... + 159491.

Almost surely, 2^76440720 is an apocalyptic number.

It is an amenable number.

76440720 is an abundant number, since it is smaller than the sum of its proper divisors (160526256).

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

76440720 is a wasteful number, since it uses less digits than its factorization.

76440720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318519 (or 318513 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 76440720 is about 8743.0383734718. The cubic root of 76440720 is about 424.3995580902.

The spelling of 76440720 in words is "seventy-six million, four hundred forty thousand, seven hundred twenty".