80920644 has 24 divisors (see below), whose sum is σ = 215788608. Its totient is φ = 23120160.

The previous prime is 80920627. The next prime is 80920649. The reversal of 80920644 is 44602908.

It is not an unprimeable number, because it can be changed into a prime (80920649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481587 + ... + 481754.

It is an arithmetic number, because the mean of its divisors is an integer number (8991192).

Almost surely, 2^80920644 is an apocalyptic number.

80920644 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

80920644 is an abundant number, since it is smaller than the sum of its proper divisors (134867964).

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

80920644 is a wasteful number, since it uses less digits than its factorization.

80920644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963355 (or 963353 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 80920644 is about 8995.5902530073. The cubic root of 80920644 is about 432.5335271992.

The spelling of 80920644 in words is "eighty million, nine hundred twenty thousand, six hundred forty-four".