309679232240 has 160 divisors (see below), whose sum is σ = 866563107840. Its totient is φ = 100541952000.

The previous prime is 309679232237. The next prime is 309679232251. The reversal of 309679232240 is 42232976903.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29797445 + ... + 29807835.

It is an arithmetic number, because the mean of its divisors is an integer number (5416019424).

Almost surely, 2^309679232240 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 309679232240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (433281553920).

309679232240 is an abundant number, since it is smaller than the sum of its proper divisors (556883875600).

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

309679232240 is a wasteful number, since it uses less digits than its factorization.

309679232240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13231 (or 13225 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 47.

The spelling of 309679232240 in words is "three hundred nine billion, six hundred seventy-nine million, two hundred thirty-two thousand, two hundred forty".