309147960 has 64 divisors (see below), whose sum is σ = 1011761280. Its totient is φ = 74944640.

The previous prime is 309147959. The next prime is 309147973. The reversal of 309147960 is 69741903.

It is a super-2 number, since 2×309147960² = 191144922344323200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115782 + ... + 118421.

It is an arithmetic number, because the mean of its divisors is an integer number (15808770).

Almost surely, 2^309147960 is an apocalyptic number.

309147960 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

309147960 is an abundant number, since it is smaller than the sum of its proper divisors (702613320).

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

309147960 is a wasteful number, since it uses less digits than its factorization.

309147960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234228 (or 234224 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 309147960 is about 17582.6039027216. The cubic root of 309147960 is about 676.1693202369.

The spelling of 309147960 in words is "three hundred nine million, one hundred forty-seven thousand, nine hundred sixty".