11389988 has 6 divisors (see below), whose sum is σ = 19932486. Its totient is φ = 5694992.

The previous prime is 11389979. The next prime is 11389997. The reversal of 11389988 is 88998311.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11389979) and next prime (11389997).

It can be written as a sum of positive squares in only one way, i.e., 9872164 + 1517824 = 3142^2 + 1232^2 .

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 as a sum of consecutive naturals, namely, 1423745 + ... + 1423752.

It is an arithmetic number, because the mean of its divisors is an integer number (3322081).

Almost surely, 2^11389988 is an apocalyptic number.

It is an amenable number.

11389988 is a deficient number, since it is larger than the sum of its proper divisors (8542498).

11389988 is a wasteful number, since it uses less digits than its factorization.

11389988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2847501 (or 2847499 counting only the distinct ones).

The product of its digits is 124416, while the sum is 47.

The square root of 11389988 is about 3374.9056283102. The cubic root of 11389988 is about 224.9958056831.

The spelling of 11389988 in words is "eleven million, three hundred eighty-nine thousand, nine hundred eighty-eight".