309930885 has 48 divisors (see below), whose sum is σ = 599721408. Its totient is φ = 146764800.

The previous prime is 309930871. The next prime is 309930889. The reversal of 309930885 is 588039903.

It is not a de Polignac number, because 309930885 - 2⁹ = 309930373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 309930885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309930889) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14005 + ... + 28565.

It is an arithmetic number, because the mean of its divisors is an integer number (12494196).

Almost surely, 2^309930885 is an apocalyptic number.

It is an amenable number.

309930885 is a deficient number, since it is larger than the sum of its proper divisors (289790523).

309930885 is a wasteful number, since it uses less digits than its factorization.

309930885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14626 (or 14623 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 309930885 is about 17604.8540181394. The cubic root of 309930885 is about 676.7396443357.

The spelling of 309930885 in words is "three hundred nine million, nine hundred thirty thousand, eight hundred eighty-five".