11142388 has 6 divisors (see below), whose sum is σ = 19499186. Its totient is φ = 5571192.

The previous prime is 11142377. The next prime is 11142401. The reversal of 11142388 is 88324111.

It can be written as a sum of positive squares in only one way, i.e., 11142244 + 144 = 3338^2 + 12^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1392795 + ... + 1392802.

Almost surely, 2^11142388 is an apocalyptic number.

It is an amenable number.

11142388 is a deficient number, since it is larger than the sum of its proper divisors (8356798).

11142388 is a wasteful number, since it uses less digits than its factorization.

11142388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2785601 (or 2785599 counting only the distinct ones).

The product of its digits is 1536, while the sum is 28.

The square root of 11142388 is about 3338.0215697326. The cubic root of 11142388 is about 223.3534983401.

Adding to 11142388 its reverse (88324111), we get a palindrome (99466499).

The spelling of 11142388 in words is "eleven million, one hundred forty-two thousand, three hundred eighty-eight".