309874842 has 32 divisors (see below), whose sum is σ = 695721600. Its totient is φ = 102225024.

The previous prime is 309874823. The next prime is 309874849. The reversal of 309874842 is 248478903.

It is not an unprimeable number, because it can be changed into a prime (309874849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24342 + ... + 34817.

It is an arithmetic number, because the mean of its divisors is an integer number (21741300).

Almost surely, 2^309874842 is an apocalyptic number.

309874842 is an abundant number, since it is smaller than the sum of its proper divisors (385846758).

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

309874842 is a wasteful number, since it uses less digits than its factorization.

309874842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59267 (or 59261 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 309874842 is about 17603.2622544800. The cubic root of 309874842 is about 676.6988515784.

The spelling of 309874842 in words is "three hundred nine million, eight hundred seventy-four thousand, eight hundred forty-two".