11951998 has 16 divisors (see below), whose sum is σ = 18445536. Its totient is φ = 5806080.

The previous prime is 11951993. The next prime is 11952001. The reversal of 11951998 is 89915911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11951993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9790 + ... + 10942.

It is an arithmetic number, because the mean of its divisors is an integer number (1152846).

Almost surely, 2^11951998 is an apocalyptic number.

11951998 is a deficient number, since it is larger than the sum of its proper divisors (6493538).

11951998 is a wasteful number, since it uses less digits than its factorization.

11951998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299.

The product of its digits is 29160, while the sum is 43.

The square root of 11951998 is about 3457.1661805589. The cubic root of 11951998 is about 228.6371707098.

The spelling of 11951998 in words is "eleven million, nine hundred fifty-one thousand, nine hundred ninety-eight".