309881488900 has 27 divisors (see below), whose sum is σ = 672454910869. Its totient is φ = 123950368880.

The previous prime is 309881488751. The next prime is 309881488901. The reversal of 309881488900 is 9884188903.

The square root of 309881488900 is 556670.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 111557336004 + 198324152896 = 334002^2 + 445336^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (309881488901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5538867 + ... + 5594533.

Almost surely, 2^309881488900 is an apocalyptic number.

309881488900 is the 556670-th square number.

It is an amenable number.

309881488900 is an abundant number, since it is smaller than the sum of its proper divisors (362573421969).

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

309881488900 is an frugal number, since it uses more digits than its factorization.

309881488900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111348 (or 55674 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 58.

The spelling of 309881488900 in words is "three hundred nine billion, eight hundred eighty-one million, four hundred eighty-eight thousand, nine hundred".