13640841 has 24 divisors (see below), whose sum is σ = 20889440. Its totient is φ = 8553600.

The previous prime is 13640833. The next prime is 13640849. The reversal of 13640841 is 14804631.

13640841 is a `hidden beast` number, since 13 + 640 + 8 + 4 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (13640833) and next prime (13640849).

It is not a de Polignac number, because 13640841 - 2³ = 13640833 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13640849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41046 + ... + 41376.

Almost surely, 2^13640841 is an apocalyptic number.

It is an amenable number.

13640841 is a deficient number, since it is larger than the sum of its proper divisors (7248599).

13640841 is a wasteful number, since it uses less digits than its factorization.

13640841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597 (or 594 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 13640841 is about 3693.3509175273. The cubic root of 13640841 is about 238.9353361122.

The spelling of 13640841 in words is "thirteen million, six hundred forty thousand, eight hundred forty-one".