30998 has 8 divisors (see below), whose sum is σ = 50760. Its totient is φ = 14080.

The previous prime is 30983. The next prime is 31013. The reversal of 30998 is 89903.

It is an interprime number because it is at equal distance from previous prime (30983) and next prime (31013).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 13.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 30998.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 30998.

It is an unprimeable number.

30998 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 3 ways as a sum of consecutive naturals, for example, 683 + ... + 726.

It is an arithmetic number, because the mean of its divisors is an integer number (6345).

2³⁰⁹⁹⁸ is an apocalyptic number.

30998 is a deficient number, since it is larger than the sum of its proper divisors (19762).

30998 is a wasteful number, since it uses less digits than its factorization.

30998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 30998 is about 176.0624889066. The cubic root of 30998 is about 31.4131309437.

The spelling of 30998 in words is "thirty thousand, nine hundred ninety-eight".