11992990 has 64 divisors (see below), whose sum is σ = 24883200. Its totient is φ = 4133376.

The previous prime is 11992987. The next prime is 11992993. The reversal of 11992990 is 9929911.

11992990 is nontrivially palindromic in base 4.

It is an interprime number because it is at equal distance from previous prime (11992987) and next prime (11992993).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11992993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151771 + ... + 151849.

It is an arithmetic number, because the mean of its divisors is an integer number (388800).

Almost surely, 2^11992990 is an apocalyptic number.

11992990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11992990 is an abundant number, since it is smaller than the sum of its proper divisors (12890210).

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

11992990 is a wasteful number, since it uses less digits than its factorization.

11992990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169.

The product of its (nonzero) digits is 13122, while the sum is 40.

The square root of 11992990 is about 3463.0896609819. The cubic root of 11992990 is about 228.8982595669.

It can be divided in two parts, 1 and 1992990, that added together give a palindrome (1992991).

The spelling of 11992990 in words is "eleven million, nine hundred ninety-two thousand, nine hundred ninety".