309513230 has 96 divisors (see below), whose sum is σ = 658476000. Its totient is φ = 103832064.

The previous prime is 309513221. The next prime is 309513247. The reversal of 309513230 is 32315903.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 309513230.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2077196 + ... + 2077344.

It is an arithmetic number, because the mean of its divisors is an integer number (6859125).

Almost surely, 2^309513230 is an apocalyptic number.

309513230 is an abundant number, since it is smaller than the sum of its proper divisors (348962770).

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

309513230 is a wasteful number, since it uses less digits than its factorization.

309513230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 26.

The square root of 309513230 is about 17592.9880918507. The cubic root of 309513230 is about 676.4355219586.

The spelling of 309513230 in words is "three hundred nine million, five hundred thirteen thousand, two hundred thirty".