11999790 has 192 divisors, whose sum is σ = 38817792. Its totient is φ = 2534400.

The previous prime is 11999789. The next prime is 11999791. The reversal of 11999790 is 9799911.

It is an interprime number because it is at equal distance from previous prime (11999789) and next prime (11999791).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11999791) 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 in 95 ways as a sum of consecutive naturals, for example, 387075 + ... + 387105.

It is an arithmetic number, because the mean of its divisors is an integer number (202176).

Almost surely, 2^11999790 is an apocalyptic number.

11999790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11999790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19408896).

11999790 is an abundant number, since it is smaller than the sum of its proper divisors (26818002).

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

11999790 is a wasteful number, since it uses less digits than its factorization.

11999790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 45927, while the sum is 45.

The square root of 11999790 is about 3464.0713041160. The cubic root of 11999790 is about 228.9415130029.

11999790 divided by its sum of digits (45) gives a palindrome (266662).

The spelling of 11999790 in words is "eleven million, nine hundred ninety-nine thousand, seven hundred ninety".