80642772 has 36 divisors (see below), whose sum is σ = 232968736. Its totient is φ = 23040720.

The previous prime is 80642729. The next prime is 80642773. The reversal of 80642772 is 27724608.

80642772 is a `hidden beast` number, since 8 + 0 + 642 + 7 + 7 + 2 = 666.

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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (80642773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159754 + ... + 160257.

Almost surely, 2^80642772 is an apocalyptic number.

It is an amenable number.

80642772 is an abundant number, since it is smaller than the sum of its proper divisors (152325964).

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

80642772 is a wasteful number, since it uses less digits than its factorization.

80642772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320028 (or 320023 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 80642772 is about 8980.1320702983. The cubic root of 80642772 is about 432.0378696226.

The spelling of 80642772 in words is "eighty million, six hundred forty-two thousand, seven hundred seventy-two".