22553840 has 20 divisors (see below), whose sum is σ = 52437864. Its totient is φ = 9021504.

The previous prime is 22553827. The next prime is 22553873. The reversal of 22553840 is 4835522.

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, 140882 + ... + 141041.

Almost surely, 2^22553840 is an apocalyptic number.

22553840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22553840 is an abundant number, since it is smaller than the sum of its proper divisors (29884024).

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

22553840 is a wasteful number, since it uses less digits than its factorization.

22553840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281936 (or 281930 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 22553840 is about 4749.0883335647. The cubic root of 22553840 is about 282.5358087586.

The spelling of 22553840 in words is "twenty-two million, five hundred fifty-three thousand, eight hundred forty".