76645044 has 72 divisors (see below), whose sum is σ = 234456768. Its totient is φ = 20609280.

The previous prime is 76645043. The next prime is 76645067. The reversal of 76645044 is 44054667.

76645044 is a `hidden beast` number, since 7 + 6 + 645 + 0 + 4 + 4 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76645043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4662 + ... + 13229.

It is an arithmetic number, because the mean of its divisors is an integer number (3256344).

Almost surely, 2^76645044 is an apocalyptic number.

It is an amenable number.

76645044 is an abundant number, since it is smaller than the sum of its proper divisors (157811724).

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

76645044 is a wasteful number, since it uses less digits than its factorization.

76645044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17925 (or 17920 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 76645044 is about 8754.7155293590. The cubic root of 76645044 is about 424.7773578960. Note that the first 3 decimals are identical.

The spelling of 76645044 in words is "seventy-six million, six hundred forty-five thousand, forty-four".