307239990 has 16 divisors (see below), whose sum is σ = 737376048. Its totient is φ = 81930656.

The previous prime is 307239983. The next prime is 307240009. The reversal of 307239990 is 99932703.

It is a super-2 number, since 2×307239990² = 188792822910400200, 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5120637 + ... + 5120696.

It is an arithmetic number, because the mean of its divisors is an integer number (46086003).

Almost surely, 2^307239990 is an apocalyptic number.

307239990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

307239990 is an abundant number, since it is smaller than the sum of its proper divisors (430136058).

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

307239990 is a wasteful number, since it uses less digits than its factorization.

307239990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10241343.

The product of its (nonzero) digits is 91854, while the sum is 42.

The square root of 307239990 is about 17528.2626064308. The cubic root of 307239990 is about 674.7754095060.

The spelling of 307239990 in words is "three hundred seven million, two hundred thirty-nine thousand, nine hundred ninety".