13640718 has 96 divisors (see below), whose sum is σ = 35392896. Its totient is φ = 3471552.

The previous prime is 13640699. The next prime is 13640723. The reversal of 13640718 is 81704631.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 164305 + ... + 164387.

It is an arithmetic number, because the mean of its divisors is an integer number (368676).

Almost surely, 2^13640718 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13640718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17696448).

13640718 is an abundant number, since it is smaller than the sum of its proper divisors (21752178).

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

13640718 is a wasteful number, since it uses less digits than its factorization.

13640718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 13640718 is about 3693.3342659445. The cubic root of 13640718 is about 238.9346179469.

The spelling of 13640718 in words is "thirteen million, six hundred forty thousand, seven hundred eighteen".