22393728 has 96 divisors (see below), whose sum is σ = 73672560. Its totient is φ = 6395904.

The previous prime is 22393727. The next prime is 22393739. The reversal of 22393728 is 82739322.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 22393692 and 22393701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22393727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6676 + ... + 9452.

Almost surely, 2^22393728 is an apocalyptic number.

22393728 is a gapful number since it is divisible by the number (28) 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 22393728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36836280).

22393728 is an abundant number, since it is smaller than the sum of its proper divisors (51278832).

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

22393728 is a wasteful number, since it uses less digits than its factorization.

22393728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2804 (or 2789 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 22393728 is about 4732.2011791554. The cubic root of 22393728 is about 281.8656369114.

The spelling of 22393728 in words is "twenty-two million, three hundred ninety-three thousand, seven hundred twenty-eight".