309071372 has 12 divisors (see below), whose sum is σ = 541736496. Its totient is φ = 154289520.

The previous prime is 309071351. The next prime is 309071377. The reversal of 309071372 is 273170903.

It is a super-2 number, since 2×309071372² = 191050225979924768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (309071377) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 58703 + ... + 63750.

It is an arithmetic number, because the mean of its divisors is an integer number (45144708).

Almost surely, 2^309071372 is an apocalyptic number.

It is an amenable number.

309071372 is a deficient number, since it is larger than the sum of its proper divisors (232665124).

309071372 is a wasteful number, since it uses less digits than its factorization.

309071372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123088 (or 123086 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 32.

The square root of 309071372 is about 17580.4258196438. The cubic root of 309071372 is about 676.1134777928.

The spelling of 309071372 in words is "three hundred nine million, seventy-one thousand, three hundred seventy-two".