80920730 has 32 divisors (see below), whose sum is σ = 164384640. Its totient is φ = 28409920.

The previous prime is 80920729. The next prime is 80920751. The reversal of 80920730 is 3702908.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 80920693 and 80920702.

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 15 ways as a sum of consecutive naturals, for example, 9494 + ... + 15873.

It is an arithmetic number, because the mean of its divisors is an integer number (5137020).

Almost surely, 2^80920730 is an apocalyptic number.

80920730 is an abundant number, since it is smaller than the sum of its proper divisors (83463910).

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

80920730 is a wasteful number, since it uses less digits than its factorization.

80920730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25414.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 80920730 is about 8995.5950331259. The cubic root of 80920730 is about 432.5336804270.

The spelling of 80920730 in words is "eighty million, nine hundred twenty thousand, seven hundred thirty".