3111998 has 4 divisors (see below), whose sum is σ = 4668000. Its totient is φ = 1555998.

The previous prime is 3111973. The next prime is 3112007. The reversal of 3111998 is 8991113.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777998 + ... + 778001.

It is an arithmetic number, because the mean of its divisors is an integer number (1167000).

Almost surely, 2^3111998 is an apocalyptic number.

3111998 is a deficient number, since it is larger than the sum of its proper divisors (1556002).

3111998 is a wasteful number, since it uses less digits than its factorization.

3111998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556001.

The product of its digits is 1944, while the sum is 32.

The square root of 3111998 is about 1764.0855988302. The cubic root of 3111998 is about 145.9978419647.

The spelling of 3111998 in words is "three million, one hundred eleven thousand, nine hundred ninety-eight".