11115988 has 24 divisors (see below), whose sum is σ = 22053920. Its totient is φ = 4860000.

The previous prime is 11115983. The next prime is 11115989. The reversal of 11115988 is 88951111.

It is a super-2 number, since 2×11115988² = 247130378432288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11115983) 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 7 ways as a sum of consecutive naturals, for example, 4638 + ... + 6613.

Almost surely, 2^11115988 is an apocalyptic number.

It is an amenable number.

11115988 is a deficient number, since it is larger than the sum of its proper divisors (10937932).

11115988 is a wasteful number, since it uses less digits than its factorization.

11115988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11287 (or 11285 counting only the distinct ones).

The product of its digits is 2880, while the sum is 34.

The square root of 11115988 is about 3334.0647864131. The cubic root of 11115988 is about 223.1769594198.

The spelling of 11115988 in words is "eleven million, one hundred fifteen thousand, nine hundred eighty-eight".