11783138 has 4 divisors (see below), whose sum is σ = 17674710. Its totient is φ = 5891568.

The previous prime is 11783137. The next prime is 11783141. The reversal of 11783138 is 83138711.

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

It can be written as a sum of positive squares in only one way, i.e., 11744329 + 38809 = 3427^2 + 197^2 .

It is a super-2 number, since 2×11783138² = 277684682254088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11783137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2945783 + ... + 2945786.

Almost surely, 2^11783138 is an apocalyptic number.

11783138 is a deficient number, since it is larger than the sum of its proper divisors (5891572).

11783138 is an equidigital number, since it uses as much as digits as its factorization.

11783138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5891571.

The product of its digits is 4032, while the sum is 32.

The square root of 11783138 is about 3432.6575710373. The cubic root of 11783138 is about 227.5553172250. Note that the first 3 decimals are identical.

The spelling of 11783138 in words is "eleven million, seven hundred eighty-three thousand, one hundred thirty-eight".