22786890 has 64 divisors (see below), whose sum is σ = 65802240. Its totient is φ = 4933440.

The previous prime is 22786867. The next prime is 22786927. The reversal of 22786890 is 9868722.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1135 + ... + 6845.

It is an arithmetic number, because the mean of its divisors is an integer number (1028160).

Almost surely, 2^22786890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22786890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32901120).

22786890 is an abundant number, since it is smaller than the sum of its proper divisors (43015350).

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

22786890 is a wasteful number, since it uses less digits than its factorization.

22786890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5747.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 22786890 is about 4773.5615634451. The cubic root of 22786890 is about 283.5056283857.

The spelling of 22786890 in words is "twenty-two million, seven hundred eighty-six thousand, eight hundred ninety".