309850972 has 12 divisors (see below), whose sum is σ = 547038576. Its totient is φ = 153554240.

The previous prime is 309850967. The next prime is 309850999. The reversal of 309850972 is 279058903.

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 3 ways as a sum of consecutive naturals, for example, 342304 + ... + 343207.

It is an arithmetic number, because the mean of its divisors is an integer number (45586548).

Almost surely, 2^309850972 is an apocalyptic number.

It is an amenable number.

309850972 is a deficient number, since it is larger than the sum of its proper divisors (237187604).

309850972 is a wasteful number, since it uses less digits than its factorization.

309850972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685628 (or 685626 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 309850972 is about 17602.5842420935. The cubic root of 309850972 is about 676.6814755132.

The spelling of 309850972 in words is "three hundred nine million, eight hundred fifty thousand, nine hundred seventy-two".