309434916 has 48 divisors (see below), whose sum is σ = 861041664. Its totient is φ = 84565536.

The previous prime is 309434903. The next prime is 309434921. The reversal of 309434916 is 619434903.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78150 + ... + 82013.

It is an arithmetic number, because the mean of its divisors is an integer number (17938368).

Almost surely, 2^309434916 is an apocalyptic number.

It is an amenable number.

309434916 is an abundant number, since it is smaller than the sum of its proper divisors (551606748).

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

309434916 is a wasteful number, since it uses less digits than its factorization.

309434916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160200 (or 160198 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 309434916 is about 17590.7622347640. The cubic root of 309434916 is about 676.3784658730.

The spelling of 309434916 in words is "three hundred nine million, four hundred thirty-four thousand, nine hundred sixteen".