309180144 has 80 divisors (see below), whose sum is σ = 983048192. Its totient is φ = 81540864.

The previous prime is 309180121. The next prime is 309180163. The reversal of 309180144 is 441081903.

It is a happy number.

It is a super-2 number, since 2×309180144² = 191184722887721472, 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, 31024 + ... + 39759.

Almost surely, 2^309180144 is an apocalyptic number.

It is an amenable number.

309180144 is an abundant number, since it is smaller than the sum of its proper divisors (673868048).

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

309180144 is a wasteful number, since it uses less digits than its factorization.

309180144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70814 (or 70808 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 309180144 is about 17583.5191017043. The cubic root of 309180144 is about 676.1927837356.

The spelling of 309180144 in words is "three hundred nine million, one hundred eighty thousand, one hundred forty-four".