309372852 has 48 divisors (see below), whose sum is σ = 731223360. Its totient is φ = 101797632.

The previous prime is 309372827. The next prime is 309372853. The reversal of 309372852 is 258273903.

It is a super-2 number, since 2×309372852² = 191423123109227808, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 309372852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309372853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 372774 + ... + 373602.

It is an arithmetic number, because the mean of its divisors is an integer number (15233820).

Almost surely, 2^309372852 is an apocalyptic number.

It is an amenable number.

309372852 is an abundant number, since it is smaller than the sum of its proper divisors (421850508).

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

309372852 is a wasteful number, since it uses less digits than its factorization.

309372852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200 (or 1198 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 309372852 is about 17588.9980385467. The cubic root of 309372852 is about 676.3332419742. Note that the first 3 decimals are identical.

The spelling of 309372852 in words is "three hundred nine million, three hundred seventy-two thousand, eight hundred fifty-two".