76720356 has 36 divisors (see below), whose sum is σ = 198062592. Its totient is φ = 25028784.

The previous prime is 76720331. The next prime is 76720361. The reversal of 76720356 is 65302767.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 76720356.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 20980 + ... + 24363.

Almost surely, 2^76720356 is an apocalyptic number.

It is an amenable number.

76720356 is an abundant number, since it is smaller than the sum of its proper divisors (121342236).

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

76720356 is a wasteful number, since it uses less digits than its factorization.

76720356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45400 (or 45395 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 36.

The square root of 76720356 is about 8759.0156981250. The cubic root of 76720356 is about 424.9164421659.

The spelling of 76720356 in words is "seventy-six million, seven hundred twenty thousand, three hundred fifty-six".