11217690 has 80 divisors (see below), whose sum is σ = 32931360. Its totient is φ = 2717280.

The previous prime is 11217683. The next prime is 11217737. The reversal of 11217690 is 9671211.

11217690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11217690² = 251673137872200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8281 + ... + 9539.

It is an arithmetic number, because the mean of its divisors is an integer number (411642).

Almost surely, 2^11217690 is an apocalyptic number.

11217690 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 11217690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16465680).

11217690 is an abundant number, since it is smaller than the sum of its proper divisors (21713670).

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

11217690 is a wasteful number, since it uses less digits than its factorization.

11217690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289 (or 1280 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 11217690 is about 3349.2820126111. The cubic root of 11217690 is about 223.8555217349.

The spelling of 11217690 in words is "eleven million, two hundred seventeen thousand, six hundred ninety".