309630968 has 32 divisors (see below), whose sum is σ = 606735360. Its totient is φ = 147855840.

The previous prime is 309630967. The next prime is 309630977. The reversal of 309630968 is 869036903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309630967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225821 + ... + 227187.

It is an arithmetic number, because the mean of its divisors is an integer number (18960480).

Almost surely, 2^309630968 is an apocalyptic number.

It is an amenable number.

309630968 is a deficient number, since it is larger than the sum of its proper divisors (297104392).

309630968 is a wasteful number, since it uses less digits than its factorization.

309630968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2627 (or 2623 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 309630968 is about 17596.3339363630. Note that the first 3 decimals coincide. The cubic root of 309630968 is about 676.5212825027.

The spelling of 309630968 in words is "three hundred nine million, six hundred thirty thousand, nine hundred sixty-eight".