80505800 has 24 divisors (see below), whose sum is σ = 187176450. Its totient is φ = 32202240.

The previous prime is 80505797. The next prime is 80505811. The reversal of 80505800 is 850508.

It can be written as a sum of positive squares in 3 ways, for example, as 71944324 + 8561476 = 8482^2 + 2926^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 80505800.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 201065 + ... + 201464.

Almost surely, 2^80505800 is an apocalyptic number.

It is an amenable number.

80505800 is an abundant number, since it is smaller than the sum of its proper divisors (106670650).

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

80505800 is a wasteful number, since it uses less digits than its factorization.

80505800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402545 (or 402536 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 80505800 is about 8972.5024380047. The cubic root of 80505800 is about 431.7931251137.

The spelling of 80505800 in words is "eighty million, five hundred five thousand, eight hundred".