22428861 has 32 divisors (see below), whose sum is σ = 38088960. Its totient is φ = 11418624.

The previous prime is 22428859. The next prime is 22428869. The reversal of 22428861 is 16882422.

It is a happy number.

It is not a de Polignac number, because 22428861 - 2¹ = 22428859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22428869) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6501 + ... + 9333.

It is an arithmetic number, because the mean of its divisors is an integer number (1190280).

Almost surely, 2^22428861 is an apocalyptic number.

22428861 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22428861 is a deficient number, since it is larger than the sum of its proper divisors (15660099).

22428861 is a wasteful number, since it uses less digits than its factorization.

22428861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2885.

The product of its digits is 12288, while the sum is 33.

The square root of 22428861 is about 4735.9118446187. The cubic root of 22428861 is about 282.0129640436.

The spelling of 22428861 in words is "twenty-two million, four hundred twenty-eight thousand, eight hundred sixty-one".