22281390 has 48 divisors (see below), whose sum is σ = 61343568. Its totient is φ = 5591808.

The previous prime is 22281379. The next prime is 22281401. The reversal of 22281390 is 9318222.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22281379) and next prime (22281401).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5752 + ... + 8811.

It is an arithmetic number, because the mean of its divisors is an integer number (1277991).

Almost surely, 2^22281390 is an apocalyptic number.

22281390 is an abundant number, since it is smaller than the sum of its proper divisors (39062178).

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

22281390 is a wasteful number, since it uses less digits than its factorization.

22281390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14593 (or 14590 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 22281390 is about 4720.3167266615. The cubic root of 22281390 is about 281.3935208235.

The spelling of 22281390 in words is "twenty-two million, two hundred eighty-one thousand, three hundred ninety".