309944404 has 72 divisors (see below), whose sum is σ = 695643200. Its totient is φ = 120692880.

The previous prime is 309944381. The next prime is 309944471. The reversal of 309944404 is 404449903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165079 + ... + 166945.

Almost surely, 2^309944404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 309944404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (347821600).

309944404 is an abundant number, since it is smaller than the sum of its proper divisors (385698796).

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

309944404 is a wasteful number, since it uses less digits than its factorization.

309944404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914 (or 1887 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 309944404 is about 17605.2379705586. The cubic root of 309944404 is about 676.7494838522.

The spelling of 309944404 in words is "three hundred nine million, nine hundred forty-four thousand, four hundred four".