13640064 has 32 divisors (see below), whose sum is σ = 36232440. Its totient is φ = 4546560.

The previous prime is 13640047. The next prime is 13640071. The reversal of 13640064 is 46004631.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17377 + ... + 18144.

Almost surely, 2^13640064 is an apocalyptic number.

It is an amenable number.

13640064 is an abundant number, since it is smaller than the sum of its proper divisors (22592376).

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

13640064 is an equidigital number, since it uses as much as digits as its factorization.

13640064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35538 (or 35526 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 13640064 is about 3693.2457269995. The cubic root of 13640064 is about 238.9307993371.

Adding to 13640064 its reverse (46004631), we get a palindrome (59644695).

The spelling of 13640064 in words is "thirteen million, six hundred forty thousand, sixty-four".