307988 has 12 divisors (see below), whose sum is σ = 553812. Its totient is φ = 149760.

The previous prime is 307969. The next prime is 308003. The reversal of 307988 is 889703.

It can be written as a sum of positive squares in 2 ways, for example, as 204304 + 103684 = 452^2 + 322^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 893 + ... + 1188.

It is an arithmetic number, because the mean of its divisors is an integer number (46151).

2³⁰⁷⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

307988 is a deficient number, since it is larger than the sum of its proper divisors (245824).

307988 is a wasteful number, since it uses less digits than its factorization.

307988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122 (or 2120 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 307988 is about 554.9666656656. The cubic root of 307988 is about 67.5322571019.

The spelling of 307988 in words is "three hundred seven thousand, nine hundred eighty-eight".