11231388 has 54 divisors (see below), whose sum is σ = 33030816. Its totient is φ = 3208464.

The previous prime is 11231377. The next prime is 11231399. The reversal of 11231388 is 88313211.

It is an interprime number because it is at equal distance from previous prime (11231377) and next prime (11231399).

It is a super-2 number, since 2×11231388² = 252288152813088, which contains 22 as substring.

It is a congruent number.

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 17 ways as a sum of consecutive naturals, for example, 1420 + ... + 4947.

Almost surely, 2^11231388 is an apocalyptic number.

11231388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11231388 is an abundant number, since it is smaller than the sum of its proper divisors (21799428).

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

11231388 is a wasteful number, since it uses less digits than its factorization.

11231388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6391 (or 6379 counting only the distinct ones).

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

The square root of 11231388 is about 3351.3263046143. The cubic root of 11231388 is about 223.9466018551.

Adding to 11231388 its reverse (88313211), we get a palindrome (99544599).

The spelling of 11231388 in words is "eleven million, two hundred thirty-one thousand, three hundred eighty-eight".