22455390 has 16 divisors (see below), whose sum is σ = 53893008. Its totient is φ = 5988096.

The previous prime is 22455379. The next prime is 22455409. The reversal of 22455390 is 9355422.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 748513 = 22455390 / (2 + 2 + 4 + 5 + 5 + 3 + 9 + 0).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374227 + ... + 374286.

It is an arithmetic number, because the mean of its divisors is an integer number (3368313).

Almost surely, 2^22455390 is an apocalyptic number.

22455390 is an abundant number, since it is smaller than the sum of its proper divisors (31437618).

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

22455390 is a wasteful number, since it uses less digits than its factorization.

22455390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748523.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 22455390 is about 4738.7118502817. The cubic root of 22455390 is about 282.1241091456.

The spelling of 22455390 in words is "twenty-two million, four hundred fifty-five thousand, three hundred ninety".