309145088 has 40 divisors (see below), whose sum is σ = 705935472. Its totient is φ = 132489216.

The previous prime is 309145079. The next prime is 309145121. The reversal of 309145088 is 880541903.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39545 + ... + 46712.

Almost surely, 2^309145088 is an apocalyptic number.

It is an amenable number.

309145088 is an abundant number, since it is smaller than the sum of its proper divisors (396790384).

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

309145088 is an frugal number, since it uses more digits than its factorization.

309145088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86282 (or 86266 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 309145088 is about 17582.5222308974. The cubic root of 309145088 is about 676.1672263481.

The spelling of 309145088 in words is "three hundred nine million, one hundred forty-five thousand, eighty-eight".