11747988 has 36 divisors (see below), whose sum is σ = 33939360. Its totient is φ = 3356496.

The previous prime is 11747971. The next prime is 11748031. The reversal of 11747988 is 88974711.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23058 + ... + 23561.

It is an arithmetic number, because the mean of its divisors is an integer number (942760).

Almost surely, 2^11747988 is an apocalyptic number.

11747988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11747988 is an abundant number, since it is smaller than the sum of its proper divisors (22191372).

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

11747988 is a wasteful number, since it uses less digits than its factorization.

11747988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46636 (or 46631 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 11747988 is about 3427.5338072731. The cubic root of 11747988 is about 227.3288202298.

The spelling of 11747988 in words is "eleven million, seven hundred forty-seven thousand, nine hundred eighty-eight".