22787226 has 96 divisors (see below), whose sum is σ = 63213696. Its totient is φ = 5760000.

The previous prime is 22787207. The next prime is 22787239. The reversal of 22787226 is 62278722.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 56626 + ... + 57026.

It is an arithmetic number, because the mean of its divisors is an integer number (658476).

Almost surely, 2^22787226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22787226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31606848).

22787226 is an abundant number, since it is smaller than the sum of its proper divisors (40426470).

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

22787226 is a wasteful number, since it uses less digits than its factorization.

22787226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468 (or 465 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 22787226 is about 4773.5967571633. The cubic root of 22787226 is about 283.5070218393.

The spelling of 22787226 in words is "twenty-two million, seven hundred eighty-seven thousand, two hundred twenty-six".