307998 has 24 divisors (see below), whose sum is σ = 679536. Its totient is φ = 100800.

The previous prime is 307969. The next prime is 308003. The reversal of 307998 is 899703.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

307998 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1158 + ... + 1398.

It is an arithmetic number, because the mean of its divisors is an integer number (28314).

2³⁰⁷⁹⁹⁸ is an apocalyptic number.

307998 is an abundant number, since it is smaller than the sum of its proper divisors (371538).

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

307998 is a wasteful number, since it uses less digits than its factorization.

307998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 307998 is about 554.9756751426. The cubic root of 307998 is about 67.5329879910.

The spelling of 307998 in words is "three hundred seven thousand, nine hundred ninety-eight".