2311998 has 16 divisors (see below), whose sum is σ = 4979856. Its totient is φ = 711360.

The previous prime is 2311993. The next prime is 2312021. The reversal of 2311998 is 8991132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14743 + ... + 14898.

It is an arithmetic number, because the mean of its divisors is an integer number (311241).

2^2311998 is an apocalyptic number.

2311998 is an abundant number, since it is smaller than the sum of its proper divisors (2667858).

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

2311998 is a wasteful number, since it uses less digits than its factorization.

2311998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29659.

The product of its digits is 3888, while the sum is 33.

The square root of 2311998 is about 1520.5255670327. The cubic root of 2311998 is about 132.2297422406.

It can be divided in two parts, 23 and 11998, that added together give a palindrome (12021).

The spelling of 2311998 in words is "two million, three hundred eleven thousand, nine hundred ninety-eight".