309856156 has 6 divisors (see below), whose sum is σ = 542248280. Its totient is φ = 154928076.

The previous prime is 309856133. The next prime is 309856163. The reversal of 309856156 is 651658903.

It is a super-2 number, since 2×309856156² = 192021674822192672, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 38732016 + ... + 38732023.

Almost surely, 2^309856156 is an apocalyptic number.

It is an amenable number.

309856156 is a deficient number, since it is larger than the sum of its proper divisors (232392124).

309856156 is a wasteful number, since it uses less digits than its factorization.

309856156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77464043 (or 77464041 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 309856156 is about 17602.7314925838. The cubic root of 309856156 is about 676.6852492598.

The spelling of 309856156 in words is "three hundred nine million, eight hundred fifty-six thousand, one hundred fifty-six".