22782270 has 64 divisors (see below), whose sum is σ = 62977536. Its totient is φ = 5166720.

The previous prime is 22782251. The next prime is 22782271. The reversal of 22782270 is 7228722.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22782271) 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, 32625 + ... + 33315.

It is an arithmetic number, because the mean of its divisors is an integer number (984024).

Almost surely, 2^22782270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22782270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31488768).

22782270 is an abundant number, since it is smaller than the sum of its proper divisors (40195266).

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

22782270 is a wasteful number, since it uses less digits than its factorization.

22782270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 22782270 is about 4773.0776235046. The cubic root of 22782270 is about 283.4864670092.

The spelling of 22782270 in words is "twenty-two million, seven hundred eighty-two thousand, two hundred seventy".