11891992 has 32 divisors (see below), whose sum is σ = 25840800. Its totient is φ = 5025024.

The previous prime is 11891953. The next prime is 11892017. The reversal of 11891992 is 29919811.

11891992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 2634 + ... + 5542.

It is an arithmetic number, because the mean of its divisors is an integer number (807525).

Almost surely, 2^11891992 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 11891992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12920400).

11891992 is an abundant number, since it is smaller than the sum of its proper divisors (13948808).

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

11891992 is a wasteful number, since it uses less digits than its factorization.

11891992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2995 (or 2991 counting only the distinct ones).

The product of its digits is 11664, while the sum is 40.

The square root of 11891992 is about 3448.4767651820. The cubic root of 11891992 is about 228.2538979311.

The spelling of 11891992 in words is "eleven million, eight hundred ninety-one thousand, nine hundred ninety-two".