11111890 has 8 divisors (see below), whose sum is σ = 20001420. Its totient is φ = 4444752.

The previous prime is 11111887. The next prime is 11111899. The reversal of 11111890 is 9811111.

11111890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 10949481 + 162409 = 3309^2 + 403^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (11111899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555585 + ... + 555604.

Almost surely, 2^11111890 is an apocalyptic number.

11111890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11111890 is a deficient number, since it is larger than the sum of its proper divisors (8889530).

11111890 is a wasteful number, since it uses less digits than its factorization.

11111890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111196.

The product of its (nonzero) digits is 72, while the sum is 22.

The square root of 11111890 is about 3333.4501646192. The cubic root of 11111890 is about 223.1495307111.

The spelling of 11111890 in words is "eleven million, one hundred eleven thousand, eight hundred ninety".