13640088 has 128 divisors (see below), whose sum is σ = 43568640. Its totient is φ = 3484800.

The previous prime is 13640071. The next prime is 13640089. The reversal of 13640088 is 88004631.

It is a happy number.

It is a nialpdrome in base 11.

It is a zygodrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13640089) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 223578 + ... + 223638.

It is an arithmetic number, because the mean of its divisors is an integer number (340380).

Almost surely, 2^13640088 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 13640088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21784320).

13640088 is an abundant number, since it is smaller than the sum of its proper divisors (29928552).

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

13640088 is a wasteful number, since it uses less digits than its factorization.

13640088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 13640088 is about 3693.2489761726. The cubic root of 13640088 is about 238.9309394718.

The spelling of 13640088 in words is "thirteen million, six hundred forty thousand, eighty-eight".