11889555 has 8 divisors (see below), whose sum is σ = 19023312. Its totient is φ = 6341088.

The previous prime is 11889547. The next prime is 11889569. The reversal of 11889555 is 55598811.

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

It is not a de Polignac number, because 11889555 - 2³ = 11889547 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396304 + ... + 396333.

It is an arithmetic number, because the mean of its divisors is an integer number (2377914).

Almost surely, 2^11889555 is an apocalyptic number.

11889555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11889555 is a deficient number, since it is larger than the sum of its proper divisors (7133757).

11889555 is an equidigital number, since it uses as much as digits as its factorization.

11889555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792645.

The product of its digits is 72000, while the sum is 42.

The square root of 11889555 is about 3448.1234026641. The cubic root of 11889555 is about 228.2383050080.

The spelling of 11889555 in words is "eleven million, eight hundred eighty-nine thousand, five hundred fifty-five".