22645000 has 80 divisors (see below), whose sum is σ = 60730560. Its totient is φ = 7752000.

The previous prime is 22644943. The next prime is 22645009. The reversal of 22645000 is 54622.

It is not an unprimeable number, because it can be changed into a prime (22645009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34677 + ... + 35323.

It is an arithmetic number, because the mean of its divisors is an integer number (759132).

Almost surely, 2^22645000 is an apocalyptic number.

22645000 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 22645000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30365280).

22645000 is an abundant number, since it is smaller than the sum of its proper divisors (38085560).

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

22645000 is an equidigital number, since it uses as much as digits as its factorization.

22645000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680 (or 661 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 22645000 is about 4758.6762865318. The cubic root of 22645000 is about 282.9159560147.

Adding to 22645000 its reverse (54622), we get a palindrome (22699622).

It can be divided in two parts, 2 and 2645000, that multiplied together give a square (5290000 = 2300²).

The spelling of 22645000 in words is "twenty-two million, six hundred forty-five thousand".