11172438 has 16 divisors (see below), whose sum is σ = 24827760. Its totient is φ = 3724128.

The previous prime is 11172419. The next prime is 11172443. The reversal of 11172438 is 83427111.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103395 + ... + 103502.

It is an arithmetic number, because the mean of its divisors is an integer number (1551735).

Almost surely, 2^11172438 is an apocalyptic number.

11172438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11172438 is an abundant number, since it is smaller than the sum of its proper divisors (13655322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11172438 is a wasteful number, since it uses less digits than its factorization.

11172438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206908 (or 206902 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 11172438 is about 3342.5197082441. The cubic root of 11172438 is about 223.5541060845.

Adding to 11172438 its reverse (83427111), we get a palindrome (94599549).

The spelling of 11172438 in words is "eleven million, one hundred seventy-two thousand, four hundred thirty-eight".