309148472 has 16 divisors (see below), whose sum is σ = 584080200. Its totient is φ = 153393760.

The previous prime is 309148471. The next prime is 309148481. The reversal of 309148472 is 274841903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309148471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146447 + ... + 148542.

Almost surely, 2^309148472 is an apocalyptic number.

It is an amenable number.

309148472 is a deficient number, since it is larger than the sum of its proper divisors (274931728).

309148472 is a wasteful number, since it uses less digits than its factorization.

309148472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295126 (or 295122 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 309148472 is about 17582.6184625613. The cubic root of 309148472 is about 676.1696935193.

The spelling of 309148472 in words is "three hundred nine million, one hundred forty-eight thousand, four hundred seventy-two".