22289436 has 72 divisors (see below), whose sum is σ = 61427184. Its totient is φ = 6773760.

The previous prime is 22289419. The next prime is 22289441. The reversal of 22289436 is 63498222.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 22289436.

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, 45151 + ... + 45641.

Almost surely, 2^22289436 is an apocalyptic number.

22289436 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22289436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30713592).

22289436 is an abundant number, since it is smaller than the sum of its proper divisors (39137748).

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

22289436 is a wasteful number, since it uses less digits than its factorization.

22289436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611 (or 606 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 22289436 is about 4721.1689230528. The cubic root of 22289436 is about 281.4273879475.

It can be divided in two parts, 2228 and 9436, that added together give a square (11664 = 108²).

The spelling of 22289436 in words is "twenty-two million, two hundred eighty-nine thousand, four hundred thirty-six".