11998404 has 72 divisors (see below), whose sum is σ = 33939360. Its totient is φ = 3542400.

The previous prime is 11998391. The next prime is 11998439. The reversal of 11998404 is 40489911.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15867 + ... + 16605.

It is an arithmetic number, because the mean of its divisors is an integer number (471380).

Almost surely, 2^11998404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11998404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16969680).

11998404 is an abundant number, since it is smaller than the sum of its proper divisors (21940956).

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

11998404 is a wasteful number, since it uses less digits than its factorization.

11998404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801 (or 796 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 11998404 is about 3463.8712447203. The cubic root of 11998404 is about 228.9326982610.

The spelling of 11998404 in words is "eleven million, nine hundred ninety-eight thousand, four hundred four".