80404820 has 24 divisors (see below), whose sum is σ = 174673800. Its totient is φ = 31052672.

The previous prime is 80404817. The next prime is 80404837. The reversal of 80404820 is 2840408.

It can be written as a sum of positive squares in 4 ways, for example, as 10982596 + 69422224 = 3314^2 + 8332^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 80404820.

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, 68735 + ... + 69894.

It is an arithmetic number, because the mean of its divisors is an integer number (7278075).

Almost surely, 2^80404820 is an apocalyptic number.

It is an amenable number.

80404820 is an abundant number, since it is smaller than the sum of its proper divisors (94268980).

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

80404820 is a wasteful number, since it uses less digits than its factorization.

80404820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138667 (or 138665 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 80404820 is about 8966.8734796472. The cubic root of 80404820 is about 431.6125140564.

The spelling of 80404820 in words is "eighty million, four hundred four thousand, eight hundred twenty".