13640022 has 32 divisors (see below), whose sum is σ = 33068160. Its totient is φ = 4133160.

The previous prime is 13640017. The next prime is 13640041. The reversal of 13640022 is 22004631.

It is a happy number.

13640022 is a `hidden beast` number, since 1 + 3 + 640 + 0 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 13639977 and 13640004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10888 + ... + 12075.

It is an arithmetic number, because the mean of its divisors is an integer number (1033380).

Almost surely, 2^13640022 is an apocalyptic number.

13640022 is an abundant number, since it is smaller than the sum of its proper divisors (19428138).

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

13640022 is a wasteful number, since it uses less digits than its factorization.

13640022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22985 (or 22979 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 13640022 is about 3693.2400409397. The cubic root of 13640022 is about 238.9305541012.

Adding to 13640022 its reverse (22004631), we get a palindrome (35644653).

The spelling of 13640022 in words is "thirteen million, six hundred forty thousand, twenty-two".