22004000 has 48 divisors (see below), whose sum is σ = 54073656. Its totient is φ = 8800000.

The previous prime is 22003979. The next prime is 22004009. The reversal of 22004000 is 40022.

It can be written as a sum of positive squares in 4 ways, for example, as 13454224 + 8549776 = 3668^2 + 2924^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is not an unprimeable number, because it can be changed into a prime (22004009) 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, 1250 + ... + 6750.

Almost surely, 2^22004000 is an apocalyptic number.

22004000 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 22004000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27036828).

22004000 is an abundant number, since it is smaller than the sum of its proper divisors (32069656).

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

22004000 is an equidigital number, since it uses as much as digits as its factorization.

22004000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5526 (or 5508 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 8.

The square root of 22004000 is about 4690.8421418760. The cubic root of 22004000 is about 280.2209140930.

Adding to 22004000 its reverse (40022), we get a palindrome (22044022).

It can be divided in two parts, 2 and 2004000, that added together give a palindrome (2004002).

The spelling of 22004000 in words is "twenty-two million, four thousand".