11889870 has 32 divisors (see below), whose sum is σ = 28667520. Its totient is φ = 3156000.

The previous prime is 11889869. The next prime is 11889893. The reversal of 11889870 is 7898811.

It is a Curzon number.

It is a congruent number.

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, 6741 + ... + 8319.

It is an arithmetic number, because the mean of its divisors is an integer number (895860).

Almost surely, 2^11889870 is an apocalyptic number.

11889870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11889870 is an abundant number, since it is smaller than the sum of its proper divisors (16777650).

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

11889870 is a wasteful number, since it uses less digits than its factorization.

11889870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840.

The product of its (nonzero) digits is 32256, while the sum is 42.

The square root of 11889870 is about 3448.1690793811. The cubic root of 11889870 is about 228.2403206267.

The spelling of 11889870 in words is "eleven million, eight hundred eighty-nine thousand, eight hundred seventy".