307990 has 16 divisors (see below), whose sum is σ = 583920. Its totient is φ = 116640.

The previous prime is 307969. The next prime is 308003. The reversal of 307990 is 99703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621 + ... + 1000.

It is an arithmetic number, because the mean of its divisors is an integer number (36495).

2³⁰⁷⁹⁹⁰ is an apocalyptic number.

307990 is a deficient number, since it is larger than the sum of its proper divisors (275930).

307990 is a wasteful number, since it uses less digits than its factorization.

307990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647.

The product of its (nonzero) digits is 1701, while the sum is 28.

The square root of 307990 is about 554.9684675727. The cubic root of 307990 is about 67.5324032810.

The spelling of 307990 in words is "three hundred seven thousand, nine hundred ninety".