11889549 has 24 divisors (see below), whose sum is σ = 20110272. Its totient is φ = 6626880.

The previous prime is 11889547. The next prime is 11889569. The reversal of 11889549 is 94598811.

It is not a de Polignac number, because 11889549 - 2¹ = 11889547 is a prime.

It is a super-2 number, since 2×11889549² = 282722750846802, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11889547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 282 + ... + 4884.

It is an arithmetic number, because the mean of its divisors is an integer number (837928).

Almost surely, 2^11889549 is an apocalyptic number.

It is an amenable number.

11889549 is a deficient number, since it is larger than the sum of its proper divisors (8220723).

11889549 is a wasteful number, since it uses less digits than its factorization.

11889549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4657 (or 4654 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 11889549 is about 3448.1225326255. The cubic root of 11889549 is about 228.2382666149.

The spelling of 11889549 in words is "eleven million, eight hundred eighty-nine thousand, five hundred forty-nine".