22288390 has 16 divisors (see below), whose sum is σ = 40198032. Its totient is φ = 8897824.

The previous prime is 22288381. The next prime is 22288397. The reversal of 22288390 is 9388222.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22288397) 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, 3972 + ... + 7768.

It is an arithmetic number, because the mean of its divisors is an integer number (2512377).

Almost surely, 2^22288390 is an apocalyptic number.

22288390 is a deficient number, since it is larger than the sum of its proper divisors (17909642).

22288390 is a wasteful number, since it uses less digits than its factorization.

22288390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4391.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 22288390 is about 4721.0581441029. The cubic root of 22288390 is about 281.4229855981.

The spelling of 22288390 in words is "twenty-two million, two hundred eighty-eight thousand, three hundred ninety".