309031979240 has 64 divisors (see below), whose sum is σ = 736390647360. Its totient is φ = 116314997760.

The previous prime is 309031979239. The next prime is 309031979279. The reversal of 309031979240 is 42979130903.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3080675 + ... + 3179405.

It is an arithmetic number, because the mean of its divisors is an integer number (11506103865).

Almost surely, 2^309031979240 is an apocalyptic number.

It is an amenable number.

309031979240 is an abundant number, since it is smaller than the sum of its proper divisors (427358668120).

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

309031979240 is a wasteful number, since it uses less digits than its factorization.

309031979240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103362 (or 103358 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 47.

The spelling of 309031979240 in words is "three hundred nine billion, thirty-one million, nine hundred seventy-nine thousand, two hundred forty".