11881890 has 40 divisors (see below), whose sum is σ = 31951260. Its totient is φ = 3168288.

The previous prime is 11881879. The next prime is 11881901. The reversal of 11881890 is 9818811.

11881890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11881879) and next prime (11881901).

It can be written as a sum of positive squares in 2 ways, for example, as 11881809 + 81 = 3447^2 + 9^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6525 + ... + 8144.

Almost surely, 2^11881890 is an apocalyptic number.

11881890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11881890 is an abundant number, since it is smaller than the sum of its proper divisors (20069370).

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

11881890 is a wasteful number, since it uses less digits than its factorization.

11881890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14688 (or 14679 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The square root of 11881890 is about 3447.0117493272. The cubic root of 11881890 is about 228.1892473073.

The spelling of 11881890 in words is "eleven million, eight hundred eighty-one thousand, eight hundred ninety".