76721480 has 32 divisors (see below), whose sum is σ = 188317440. Its totient is φ = 27898560.

The previous prime is 76721479. The next prime is 76721483. The reversal of 76721480 is 8412767.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 76721480.

It is not an unprimeable number, because it can be changed into a prime (76721483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86744 + ... + 87623.

It is an arithmetic number, because the mean of its divisors is an integer number (5884920).

Almost surely, 2^76721480 is an apocalyptic number.

It is an amenable number.

76721480 is an abundant number, since it is smaller than the sum of its proper divisors (111595960).

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

76721480 is a wasteful number, since it uses less digits than its factorization.

76721480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174389 (or 174385 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 76721480 is about 8759.0798603506. The cubic root of 76721480 is about 424.9185172508.

The spelling of 76721480 in words is "seventy-six million, seven hundred twenty-one thousand, four hundred eighty".