12113388 has 120 divisors (see below), whose sum is σ = 37268000. Its totient is φ = 3429216.

The previous prime is 12113377. The next prime is 12113389. The reversal of 12113388 is 88331121.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12113389) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 111078 + ... + 111186.

Almost surely, 2^12113388 is an apocalyptic number.

12113388 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 12113388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18634000).

12113388 is an abundant number, since it is smaller than the sum of its proper divisors (25154612).

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

12113388 is a wasteful number, since it uses less digits than its factorization.

12113388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 121 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 12113388 is about 3480.4292838671. The cubic root of 12113388 is about 229.6616828125.

It can be divided in two parts, 1211338 and 8, that added together give a triangular number (1211346 = T₁₅₅₆).

The spelling of 12113388 in words is "twelve million, one hundred thirteen thousand, three hundred eighty-eight".