11949918 has 8 divisors (see below), whose sum is σ = 23899848. Its totient is φ = 3983304.

The previous prime is 11949913. The next prime is 11949923. The reversal of 11949918 is 81994911.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11949913) and next prime (11949923).

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

11949918 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 11949918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11949913) 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, 995821 + ... + 995832.

It is an arithmetic number, because the mean of its divisors is an integer number (2987481).

Almost surely, 2^11949918 is an apocalyptic number.

11949918 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11949918 is a wasteful number, since it uses less digits than its factorization.

11949918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991658.

The product of its digits is 23328, while the sum is 42.

The square root of 11949918 is about 3456.8653430529. The cubic root of 11949918 is about 228.6239067377.

The spelling of 11949918 in words is "eleven million, nine hundred forty-nine thousand, nine hundred eighteen".