309475228 has 6 divisors (see below), whose sum is σ = 541581656. Its totient is φ = 154737612.

The previous prime is 309475207. The next prime is 309475241. The reversal of 309475228 is 822574903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38684400 + ... + 38684407.

Almost surely, 2^309475228 is an apocalyptic number.

It is an amenable number.

309475228 is a deficient number, since it is larger than the sum of its proper divisors (232106428).

309475228 is a wasteful number, since it uses less digits than its factorization.

309475228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77368811 (or 77368809 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 309475228 is about 17591.9080261352. The cubic root of 309475228 is about 676.4078365994.

The spelling of 309475228 in words is "three hundred nine million, four hundred seventy-five thousand, two hundred twenty-eight".