13209888 has 48 divisors (see below), whose sum is σ = 35622720. Its totient is φ = 4283136.

The previous prime is 13209881. The next prime is 13209919. The reversal of 13209888 is 88890231.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×13209888² = 349002281945088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13209881) 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, 1693 + ... + 5411.

It is an arithmetic number, because the mean of its divisors is an integer number (742140).

Almost surely, 2^13209888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13209888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17811360).

13209888 is an abundant number, since it is smaller than the sum of its proper divisors (22412832).

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

13209888 is a wasteful number, since it uses less digits than its factorization.

13209888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3769 (or 3761 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 13209888 is about 3634.5409613870. The cubic root of 13209888 is about 236.3921470360.

The spelling of 13209888 in words is "thirteen million, two hundred nine thousand, eight hundred eighty-eight".