309940992 has 90 divisors (see below), whose sum is σ = 924249788. Its totient is φ = 103306752.

The previous prime is 309940933. The next prime is 309941039. The reversal of 309940992 is 299049903.

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 9 ways as a sum of consecutive naturals, for example, 13263 + ... + 28209.

Almost surely, 2^309940992 is an apocalyptic number.

309940992 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 309940992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (462124894).

309940992 is an abundant number, since it is smaller than the sum of its proper divisors (614308796).

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

309940992 is an equidigital number, since it uses as much as digits as its factorization.

309940992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14975 (or 14952 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 309940992 is about 17605.1410673133. The cubic root of 309940992 is about 676.7470005276.

The spelling of 309940992 in words is "three hundred nine million, nine hundred forty thousand, nine hundred ninety-two".