80011920 has 40 divisors (see below), whose sum is σ = 248037696. Its totient is φ = 21336448.

The previous prime is 80011909. The next prime is 80011933. The reversal of 80011920 is 2911008.

It is a tau number, because it is divible by the number of its divisors (40).

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, 166452 + ... + 166931.

Almost surely, 2^80011920 is an apocalyptic number.

80011920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80011920 is an abundant number, since it is smaller than the sum of its proper divisors (168025776).

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

80011920 is a wasteful number, since it uses less digits than its factorization.

80011920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333399 (or 333393 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 80011920 is about 8944.9382334368. The cubic root of 80011920 is about 430.9083376615.

Adding to 80011920 its reverse (2911008), we get a palindrome (82922928).

It can be divided in two parts, 800 and 11920, that added together give a triangular number (12720 = T₁₅₉).

The spelling of 80011920 in words is "eighty million, eleven thousand, nine hundred twenty".