11921896 has 48 divisors (see below), whose sum is σ = 27548100. Its totient is φ = 4806144.

The previous prime is 11921867. The next prime is 11921933. The reversal of 11921896 is 69812911.

It can be written as a sum of positive squares in 2 ways, for example, as 9922500 + 1999396 = 3150^2 + 1414^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5770 + ... + 7558.

Almost surely, 2^11921896 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 11921896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13774050).

11921896 is an abundant number, since it is smaller than the sum of its proper divisors (15626204).

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

11921896 is a wasteful number, since it uses less digits than its factorization.

11921896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826 (or 1815 counting only the distinct ones).

The product of its digits is 7776, while the sum is 37.

The square root of 11921896 is about 3452.8098702361. The cubic root of 11921896 is about 228.4450627407.

The spelling of 11921896 in words is "eleven million, nine hundred twenty-one thousand, eight hundred ninety-six".