11388442 has 8 divisors (see below), whose sum is σ = 18396756. Its totient is φ = 5256192.

The previous prime is 11388437. The next prime is 11388449. The reversal of 11388442 is 24488311.

11388442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9853321 + 1535121 = 3139^2 + 1239^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×11388442² = 259393222374728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11388449) 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, 218983 + ... + 219034.

Almost surely, 2^11388442 is an apocalyptic number.

11388442 is a deficient number, since it is larger than the sum of its proper divisors (7008314).

11388442 is a wasteful number, since it uses less digits than its factorization.

11388442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438032.

The product of its digits is 6144, while the sum is 31.

The square root of 11388442 is about 3374.6765770959. The cubic root of 11388442 is about 224.9856254191.

The spelling of 11388442 in words is "eleven million, three hundred eighty-eight thousand, four hundred forty-two".