22388736 has 56 divisors (see below), whose sum is σ = 59765184. Its totient is φ = 7454720.

The previous prime is 22388713. The next prime is 22388741. The reversal of 22388736 is 63788322.

It is a happy number.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 22388694 and 22388703.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24121 + ... + 25031.

Almost surely, 2^22388736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22388736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29882592).

22388736 is an abundant number, since it is smaller than the sum of its proper divisors (37376448).

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

22388736 is an frugal number, since it uses more digits than its factorization.

22388736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940 (or 916 counting only the distinct ones).

The product of its digits is 96768, while the sum is 39.

The square root of 22388736 is about 4731.6736996543. The cubic root of 22388736 is about 281.8446909002.

The spelling of 22388736 in words is "twenty-two million, three hundred eighty-eight thousand, seven hundred thirty-six".