11899888 has 80 divisors (see below), whose sum is σ = 30998016. Its totient is φ = 4273920.

The previous prime is 11899879. The next prime is 11899897. The reversal of 11899888 is 88899811.

It is an interprime number because it is at equal distance from previous prime (11899879) and next prime (11899897).

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15645 + ... + 16387.

Almost surely, 2^11899888 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 11899888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15499008).

11899888 is an abundant number, since it is smaller than the sum of its proper divisors (19098128).

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

11899888 is a wasteful number, since it uses less digits than its factorization.

11899888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782 (or 776 counting only the distinct ones).

The product of its digits is 331776, while the sum is 52.

The square root of 11899888 is about 3449.6214285049. The cubic root of 11899888 is about 228.3044051416.

The spelling of 11899888 in words is "eleven million, eight hundred ninety-nine thousand, eight hundred eighty-eight".