22333640 has 96 divisors (see below), whose sum is σ = 60056640. Its totient is φ = 7320960.

The previous prime is 22333637. The next prime is 22333687. The reversal of 22333640 is 4633322.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 269039 + ... + 269121.

It is an arithmetic number, because the mean of its divisors is an integer number (625590).

Almost surely, 2^22333640 is an apocalyptic number.

22333640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22333640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30028320).

22333640 is an abundant number, since it is smaller than the sum of its proper divisors (37723000).

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

22333640 is a wasteful number, since it uses less digits than its factorization.

22333640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

The square root of 22333640 is about 4725.8480720396. The cubic root of 22333640 is about 281.6133056407.

Adding to 22333640 its reverse (4633322), we get a palindrome (26966962).

The spelling of 22333640 in words is "twenty-two million, three hundred thirty-three thousand, six hundred forty".