11143890 has 24 divisors (see below), whose sum is σ = 28974348. Its totient is φ = 2971680.

The previous prime is 11143889. The next prime is 11143897. The reversal of 11143890 is 9834111.

It can be written as a sum of positive squares in 2 ways, for example, as 10169721 + 974169 = 3189^2 + 987^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (11143897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61821 + ... + 62000.

Almost surely, 2^11143890 is an apocalyptic number.

11143890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11143890 is an abundant number, since it is smaller than the sum of its proper divisors (17830458).

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

11143890 is a wasteful number, since it uses less digits than its factorization.

11143890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123834 (or 123831 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 11143890 is about 3338.2465457183. The cubic root of 11143890 is about 223.3635339471.

The spelling of 11143890 in words is "eleven million, one hundred forty-three thousand, eight hundred ninety".