11397888 has 144 divisors (see below), whose sum is σ = 36056160. Its totient is φ = 3538944.

The previous prime is 11397833. The next prime is 11397907. The reversal of 11397888 is 88879311.

It is a tau number, because it is divible by the number of its divisors (144).

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 15 ways as a sum of consecutive naturals, for example, 117456 + ... + 117552.

It is an arithmetic number, because the mean of its divisors is an integer number (250390).

Almost surely, 2^11397888 is an apocalyptic number.

11397888 is a gapful number since it is divisible by the number (18) 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 11397888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18028080).

11397888 is an abundant number, since it is smaller than the sum of its proper divisors (24658272).

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

11397888 is an equidigital number, since it uses as much as digits as its factorization.

11397888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 119 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The square root of 11397888 is about 3376.0758285323. The cubic root of 11397888 is about 225.0478120615.

The spelling of 11397888 in words is "eleven million, three hundred ninety-seven thousand, eight hundred eighty-eight".