80045920 has 24 divisors (see below), whose sum is σ = 189108864. Its totient is φ = 32018304.

The previous prime is 80045909. The next prime is 80045921. The reversal of 80045920 is 2954008.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80045921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249984 + ... + 250303.

It is an arithmetic number, because the mean of its divisors is an integer number (7879536).

Almost surely, 2^80045920 is an apocalyptic number.

80045920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80045920 is an abundant number, since it is smaller than the sum of its proper divisors (109062944).

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

80045920 is a wasteful number, since it uses less digits than its factorization.

80045920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500302 (or 500294 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 80045920 is about 8946.8385477776. The cubic root of 80045920 is about 430.9693652714.

Adding to 80045920 its reverse (2954008), we get a palindrome (82999928).

It can be divided in two parts, 8004 and 5920, that added together give a square (13924 = 118²).

The spelling of 80045920 in words is "eighty million, forty-five thousand, nine hundred twenty".