22861000 has 32 divisors (see below), whose sum is σ = 53497080. Its totient is φ = 9144000.

The previous prime is 22860989. The next prime is 22861001. The reversal of 22861000 is 16822.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12659364 + 10201636 = 3558^2 + 3194^2 .

It is not an unprimeable number, because it can be changed into a prime (22861001) 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, 10431 + ... + 12430.

Almost surely, 2^22861000 is an apocalyptic number.

22861000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22861000 is an abundant number, since it is smaller than the sum of its proper divisors (30636080).

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

22861000 is a wasteful number, since it uses less digits than its factorization.

22861000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22882 (or 22868 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 22861000 is about 4781.3178099767. The cubic root of 22861000 is about 283.8126450596.

Adding to 22861000 its reverse (16822), we get a palindrome (22877822).

The spelling of 22861000 in words is "twenty-two million, eight hundred sixty-one thousand".