11989356 has 24 divisors (see below), whose sum is σ = 28331520. Its totient is φ = 3945552.

The previous prime is 11989333. The next prime is 11989357. The reversal of 11989356 is 65398911.

It is not an unprimeable number, because it can be changed into a prime (11989357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5376 + ... + 7271.

It is an arithmetic number, because the mean of its divisors is an integer number (1180480).

Almost surely, 2^11989356 is an apocalyptic number.

It is an amenable number.

11989356 is an abundant number, since it is smaller than the sum of its proper divisors (16342164).

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

11989356 is a wasteful number, since it uses less digits than its factorization.

11989356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12733 (or 12731 counting only the distinct ones).

The product of its digits is 58320, while the sum is 42.

The square root of 11989356 is about 3462.5649452393. The cubic root of 11989356 is about 228.8751377180.

The spelling of 11989356 in words is "eleven million, nine hundred eighty-nine thousand, three hundred fifty-six".