80805400 has 48 divisors (see below), whose sum is σ = 202330800. Its totient is φ = 29834880.

The previous prime is 80805377. The next prime is 80805409. The reversal of 80805400 is 450808.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80805409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12940 + ... + 18139.

It is an arithmetic number, because the mean of its divisors is an integer number (4215225).

Almost surely, 2^80805400 is an apocalyptic number.

It is an amenable number.

80805400 is an abundant number, since it is smaller than the sum of its proper divisors (121525400).

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

80805400 is a wasteful number, since it uses less digits than its factorization.

80805400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31108 (or 31099 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 80805400 is about 8989.1823877369. The cubic root of 80805400 is about 432.3280972314.

The spelling of 80805400 in words is "eighty million, eight hundred five thousand, four hundred".