11291790 has 16 divisors (see below), whose sum is σ = 27100368. Its totient is φ = 3011136.

The previous prime is 11291789. The next prime is 11291801. The reversal of 11291790 is 9719211.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 376393 = 11291790 / (1 + 1 + 2 + 9 + 1 + 7 + 9 + 0).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 188167 + ... + 188226.

It is an arithmetic number, because the mean of its divisors is an integer number (1693773).

Almost surely, 2^11291790 is an apocalyptic number.

11291790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11291790 is an abundant number, since it is smaller than the sum of its proper divisors (15808578).

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

11291790 is a wasteful number, since it uses less digits than its factorization.

11291790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376403.

The product of its (nonzero) digits is 1134, while the sum is 30.

The square root of 11291790 is about 3360.3258770542. The cubic root of 11291790 is about 224.3473432391.

The spelling of 11291790 in words is "eleven million, two hundred ninety-one thousand, seven hundred ninety".