11788157 has 4 divisors (see below), whose sum is σ = 12481596. Its totient is φ = 11094720.

The previous prime is 11788129. The next prime is 11788159. The reversal of 11788157 is 75188711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8231161 + 3556996 = 2869^2 + 1886^2 .

It is a cyclic number.

It is not a de Polignac number, because 11788157 - 2⁶ = 11788093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11788157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11788159) 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, 346694 + ... + 346727.

It is an arithmetic number, because the mean of its divisors is an integer number (3120399).

Almost surely, 2^11788157 is an apocalyptic number.

11788157 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

11788157 is a deficient number, since it is larger than the sum of its proper divisors (693439).

11788157 is an equidigital number, since it uses as much as digits as its factorization.

11788157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693438.

The product of its digits is 15680, while the sum is 38.

The square root of 11788157 is about 3433.3885594264. The cubic root of 11788157 is about 227.5876215234.

The spelling of 11788157 in words is "eleven million, seven hundred eighty-eight thousand, one hundred fifty-seven".