11991488 has 14 divisors (see below), whose sum is σ = 23795736. Its totient is φ = 5995712.

The previous prime is 11991481. The next prime is 11991517. The reversal of 11991488 is 88419911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11991481) 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 as a sum of consecutive naturals, namely, 93620 + ... + 93747.

Almost surely, 2^11991488 is an apocalyptic number.

It is an amenable number.

11991488 is a deficient number, since it is larger than the sum of its proper divisors (11804248).

11991488 is an equidigital number, since it uses as much as digits as its factorization.

11991488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187379 (or 187369 counting only the distinct ones).

The product of its digits is 20736, while the sum is 41.

The square root of 11991488 is about 3462.8727958156. The cubic root of 11991488 is about 228.8887034417. Note that the first 3 decimals are identical.

The spelling of 11991488 in words is "eleven million, nine hundred ninety-one thousand, four hundred eighty-eight".