11969388 has 36 divisors (see below), whose sum is σ = 30361968. Its totient is φ = 3975840.

The previous prime is 11969387. The next prime is 11969401. The reversal of 11969388 is 88396911.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (11969383) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 17778 + ... + 18438.

It is an arithmetic number, because the mean of its divisors is an integer number (843388).

Almost surely, 2^11969388 is an apocalyptic number.

11969388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11969388 is an abundant number, since it is smaller than the sum of its proper divisors (18392580).

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

11969388 is a wasteful number, since it uses less digits than its factorization.

11969388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174 (or 1169 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 11969388 is about 3459.6803320538. The cubic root of 11969388 is about 228.7480049992.

The spelling of 11969388 in words is "eleven million, nine hundred sixty-nine thousand, three hundred eighty-eight".