80005920 has 48 divisors (see below), whose sum is σ = 252020160. Its totient is φ = 21334784.

The previous prime is 80005897. The next prime is 80005931. The reversal of 80005920 is 2950008.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82860 + ... + 83819.

It is an arithmetic number, because the mean of its divisors is an integer number (5250420).

Almost surely, 2^80005920 is an apocalyptic number.

80005920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80005920 is an abundant number, since it is smaller than the sum of its proper divisors (172014240).

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

80005920 is a wasteful number, since it uses less digits than its factorization.

80005920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166697 (or 166689 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 80005920 is about 8944.6028419377. The cubic root of 80005920 is about 430.8975662887.

Adding to 80005920 its reverse (2950008), we get a palindrome (82955928).

The spelling of 80005920 in words is "eighty million, five thousand, nine hundred twenty".