11995690 has 24 divisors (see below), whose sum is σ = 25118532. Its totient is φ = 4112640.

The previous prime is 11995661. The next prime is 11995691. The reversal of 11995690 is 9659911.

It can be written as a sum of positive squares in 2 ways, for example, as 10055241 + 1940449 = 3171^2 + 1393^2 .

It is a super-2 number, since 2×11995690² = 287793157152200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (11995691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11751 + ... + 12730.

Almost surely, 2^11995690 is an apocalyptic number.

11995690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11995690 is an abundant number, since it is smaller than the sum of its proper divisors (13122842).

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

11995690 is a wasteful number, since it uses less digits than its factorization.

11995690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24502 (or 24495 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 40.

The square root of 11995690 is about 3463.4794643537. The cubic root of 11995690 is about 228.9154356819.

It can be divided in two parts, 1199 and 5690, that added together give a square (6889 = 83²).

The spelling of 11995690 in words is "eleven million, nine hundred ninety-five thousand, six hundred ninety".