309332712 has 64 divisors (see below), whose sum is σ = 852223680. Its totient is φ = 92961792.

The previous prime is 309332707. The next prime is 309332743. The reversal of 309332712 is 217233903.

It is a self number, because there is not a number n which added to its sum of digits gives 309332712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1888 + ... + 24944.

It is an arithmetic number, because the mean of its divisors is an integer number (13315995).

Almost surely, 2^309332712 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 309332712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (426111840).

309332712 is an abundant number, since it is smaller than the sum of its proper divisors (542890968).

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

309332712 is a wasteful number, since it uses less digits than its factorization.

309332712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23122 (or 23118 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 30.

The square root of 309332712 is about 17587.8569473373. The cubic root of 309332712 is about 676.3039901180.

The spelling of 309332712 in words is "three hundred nine million, three hundred thirty-two thousand, seven hundred twelve".