11142638 has 8 divisors (see below), whose sum is σ = 17999688. Its totient is φ = 5142744.

The previous prime is 11142631. The next prime is 11142653. The reversal of 11142638 is 83624111.

11142638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 428563 = 11142638 / (1 + 1 + 1 + 4 + 2 + 6 + 3 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11142631) 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, 214256 + ... + 214307.

It is an arithmetic number, because the mean of its divisors is an integer number (2249961).

Almost surely, 2^11142638 is an apocalyptic number.

11142638 is a deficient number, since it is larger than the sum of its proper divisors (6857050).

11142638 is a wasteful number, since it uses less digits than its factorization.

11142638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428578.

The product of its digits is 1152, while the sum is 26.

The square root of 11142638 is about 3338.0590168540. The cubic root of 11142638 is about 223.3551687767.

Adding to 11142638 its reverse (83624111), we get a palindrome (94766749).

The spelling of 11142638 in words is "eleven million, one hundred forty-two thousand, six hundred thirty-eight".