22235440 has 40 divisors (see below), whose sum is σ = 51894000. Its totient is φ = 8860416.

The previous prime is 22235417. The next prime is 22235441. The reversal of 22235440 is 4453222.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (22235441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39642 + ... + 40198.

It is an arithmetic number, because the mean of its divisors is an integer number (1297350).

Almost surely, 2^22235440 is an apocalyptic number.

22235440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22235440 is an abundant number, since it is smaller than the sum of its proper divisors (29658560).

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

22235440 is a wasteful number, since it uses less digits than its factorization.

22235440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069 (or 1063 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 22235440 is about 4715.4469565461. The cubic root of 22235440 is about 281.1999522469.

Adding to 22235440 its reverse (4453222), we get a palindrome (26688662).

The spelling of 22235440 in words is "twenty-two million, two hundred thirty-five thousand, four hundred forty".