11157988 has 12 divisors (see below), whose sum is σ = 19942272. Its totient is φ = 5460200.

The previous prime is 11157983. The next prime is 11157989. The reversal of 11157988 is 88975111.

It is a self number, because there is not a number n which added to its sum of digits gives 11157988.

It is not an unprimeable number, because it can be changed into a prime (11157983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29488 + ... + 29863.

It is an arithmetic number, because the mean of its divisors is an integer number (1661856).

Almost surely, 2^11157988 is an apocalyptic number.

It is an amenable number.

11157988 is a deficient number, since it is larger than the sum of its proper divisors (8784284).

11157988 is a wasteful number, since it uses less digits than its factorization.

11157988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59402 (or 59400 counting only the distinct ones).

The product of its digits is 20160, while the sum is 40.

The square root of 11157988 is about 3340.3574659009. The cubic root of 11157988 is about 223.4576857536.

The spelling of 11157988 in words is "eleven million, one hundred fifty-seven thousand, nine hundred eighty-eight".