2011998 has 16 divisors (see below), whose sum is σ = 4081536. Its totient is φ = 661080.

The previous prime is 2011987. The next prime is 2012009. The reversal of 2011998 is 8991102.

It is an interprime number because it is at equal distance from previous prime (2011987) and next prime (2012009).

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1936 + ... + 2787.

It is an arithmetic number, because the mean of its divisors is an integer number (255096).

2^2011998 is an apocalyptic number.

2011998 is an abundant number, since it is smaller than the sum of its proper divisors (2069538).

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

2011998 is a wasteful number, since it uses less digits than its factorization.

2011998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4799.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 2011998 is about 1418.4491531246. The cubic root of 2011998 is about 126.2435450740.

The spelling of 2011998 in words is "two million, eleven thousand, nine hundred ninety-eight".