11890866 has 32 divisors (see below), whose sum is σ = 25800768. Its totient is φ = 3631680.

The previous prime is 11890807. The next prime is 11890873. The reversal of 11890866 is 66809811.

11890866 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11761 + ... + 12731.

It is an arithmetic number, because the mean of its divisors is an integer number (806274).

Almost surely, 2^11890866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11890866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12900384).

11890866 is an abundant number, since it is smaller than the sum of its proper divisors (13909902).

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

11890866 is a wasteful number, since it uses less digits than its factorization.

11890866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 11890866 is about 3448.3135008291. The cubic root of 11890866 is about 228.2466935871.

The spelling of 11890866 in words is "eleven million, eight hundred ninety thousand, eight hundred sixty-six".