11906138 has 4 divisors (see below), whose sum is σ = 17859210. Its totient is φ = 5953068.

The previous prime is 11906131. The next prime is 11906159. The reversal of 11906138 is 83160911.

It is a happy number.

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., 8958049 + 2948089 = 2993^2 + 1717^2 .

It is a super-2 number, since 2×11906138² = 283512244150088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11906138.

It is not an unprimeable number, because it can be changed into a prime (11906131) by changing a digit.

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 as a sum of consecutive naturals, namely, 2976533 + ... + 2976536.

Almost surely, 2^11906138 is an apocalyptic number.

11906138 is a deficient number, since it is larger than the sum of its proper divisors (5953072).

11906138 is an equidigital number, since it uses as much as digits as its factorization.

11906138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5953071.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 11906138 is about 3450.5272060947. The cubic root of 11906138 is about 228.3443677809.

The spelling of 11906138 in words is "eleven million, nine hundred six thousand, one hundred thirty-eight".