22486644 has 36 divisors (see below), whose sum is σ = 56986020. Its totient is φ = 7476480.

The previous prime is 22486643. The next prime is 22486649. The reversal of 22486644 is 44668422.

It is a happy number.

22486644 is a `hidden beast` number, since 2 + 2 + 4 + 8 + 6 + 644 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3459600 + 19027044 = 1860^2 + 4362^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 22486599 and 22486608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22486643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25084 + ... + 25964.

It is an arithmetic number, because the mean of its divisors is an integer number (1582945).

Almost surely, 2^22486644 is an apocalyptic number.

It is an amenable number.

22486644 is an abundant number, since it is smaller than the sum of its proper divisors (34499376).

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

22486644 is a wasteful number, since it uses less digits than its factorization.

22486644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600 (or 1595 counting only the distinct ones).

The product of its digits is 73728, while the sum is 36.

The square root of 22486644 is about 4742.0084352519. The cubic root of 22486644 is about 282.2549377092.

It can be divided in two parts, 224 and 86644, that added together give a palindrome (86868).

The spelling of 22486644 in words is "twenty-two million, four hundred eighty-six thousand, six hundred forty-four".