223654728 has 128 divisors (see below), whose sum is σ = 638668800. Its totient is φ = 64646400.

The previous prime is 223654727. The next prime is 223654729. The reversal of 223654728 is 827456322.

It is an interprime number because it is at equal distance from previous prime (223654727) and next prime (223654729).

It is not an unprimeable number, because it can be changed into a prime (223654723) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1002825 + ... + 1003047.

It is an arithmetic number, because the mean of its divisors is an integer number (4989600).

Almost surely, 2^223654728 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 223654728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319334400).

223654728 is an abundant number, since it is smaller than the sum of its proper divisors (415014072).

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

223654728 is a wasteful number, since it uses less digits than its factorization.

223654728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 399 counting only the distinct ones).

The product of its digits is 161280, while the sum is 39.

The square root of 223654728 is about 14955.0903708403. The cubic root of 223654728 is about 607.0055954763.

The spelling of 223654728 in words is "two hundred twenty-three million, six hundred fifty-four thousand, seven hundred twenty-eight".