22644642 has 8 divisors (see below), whose sum is σ = 45289296. Its totient is φ = 7548212.

The previous prime is 22644631. The next prime is 22644667. The reversal of 22644642 is 24644622.

It is a sphenic number, since it is the product of 3 distinct primes.

22644642 is an admirable number.

It is a super-2 number, since 2×22644642² = 1025559622616328, which contains 22 as substring.

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, 1887048 + ... + 1887059.

It is an arithmetic number, because the mean of its divisors is an integer number (5661162).

Almost surely, 2^22644642 is an apocalyptic number.

22644642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22644642 is a wasteful number, since it uses less digits than its factorization.

22644642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3774112.

The product of its digits is 18432, while the sum is 30.

The square root of 22644642 is about 4758.6386708806. The cubic root of 22644642 is about 282.9144651124.

The spelling of 22644642 in words is "twenty-two million, six hundred forty-four thousand, six hundred forty-two".