13700640 has 192 divisors, whose sum is σ = 48335616. Its totient is φ = 3244032.

The previous prime is 13700611. The next prime is 13700651. The reversal of 13700640 is 4600731.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187644 + ... + 187716.

It is an arithmetic number, because the mean of its divisors is an integer number (251748).

Almost surely, 2^13700640 is an apocalyptic number.

13700640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13700640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24167808).

13700640 is an abundant number, since it is smaller than the sum of its proper divisors (34634976).

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

13700640 is a wasteful number, since it uses less digits than its factorization.

13700640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 13700640 is about 3701.4375585710. The cubic root of 13700640 is about 239.2839770318.

Subtracting from 13700640 its reverse (4600731), we obtain a palindrome (9099909).

The spelling of 13700640 in words is "thirteen million, seven hundred thousand, six hundred forty".