11812290 has 32 divisors (see below), whose sum is σ = 32400000. Its totient is φ = 2699904.

The previous prime is 11812261. The next prime is 11812291. The reversal of 11812290 is 9221811.

11812290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 11812290.

It is not an unprimeable number, because it can be changed into a prime (11812291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27915 + ... + 28334.

It is an arithmetic number, because the mean of its divisors is an integer number (1012500).

Almost surely, 2^11812290 is an apocalyptic number.

11812290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11812290 is an abundant number, since it is smaller than the sum of its proper divisors (20587710).

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

11812290 is a wasteful number, since it uses less digits than its factorization.

11812290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56266.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 11812290 is about 3436.9012205765. The cubic root of 11812290 is about 227.7428232876.

The spelling of 11812290 in words is "eleven million, eight hundred twelve thousand, two hundred ninety".