22025840 has 20 divisors (see below), whose sum is σ = 51210264. Its totient is φ = 8810304.

The previous prime is 22025837. The next prime is 22025869. The reversal of 22025840 is 4852022.

It is a tau number, because it is divible by the number of its divisors (20).

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, 137582 + ... + 137741.

Almost surely, 2^22025840 is an apocalyptic number.

22025840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22025840 is an abundant number, since it is smaller than the sum of its proper divisors (29184424).

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

22025840 is a wasteful number, since it uses less digits than its factorization.

22025840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275336 (or 275330 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 22025840 is about 4693.1695047164. The cubic root of 22025840 is about 280.3135942280.

Adding to 22025840 its reverse (4852022), we get a palindrome (26877862).

The spelling of 22025840 in words is "twenty-two million, twenty-five thousand, eight hundred forty".