11909884 has 48 divisors (see below), whose sum is σ = 25553920. Its totient is φ = 4743360.

The previous prime is 11909879. The next prime is 11909897. The reversal of 11909884 is 48890911.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32269 + ... + 32635.

Almost surely, 2^11909884 is an apocalyptic number.

11909884 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11909884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12776960).

11909884 is an abundant number, since it is smaller than the sum of its proper divisors (13644036).

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

11909884 is a wasteful number, since it uses less digits than its factorization.

11909884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 11909884 is about 3451.0699790065. The cubic root of 11909884 is about 228.3683130857.

The spelling of 11909884 in words is "eleven million, nine hundred nine thousand, eight hundred eighty-four".