223507728 has 80 divisors (see below), whose sum is σ = 657249600. Its totient is φ = 72679680.

The previous prime is 223507717. The next prime is 223507751. The reversal of 223507728 is 827705322.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 223507692 and 223507701.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11403 + ... + 24021.

It is an arithmetic number, because the mean of its divisors is an integer number (8215620).

Almost surely, 2^223507728 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 223507728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328624800).

223507728 is an abundant number, since it is smaller than the sum of its proper divisors (433741872).

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

223507728 is a wasteful number, since it uses less digits than its factorization.

223507728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12677 (or 12665 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 223507728 is about 14950.1748484759. The cubic root of 223507728 is about 606.8725788698.

The spelling of 223507728 in words is "two hundred twenty-three million, five hundred seven thousand, seven hundred twenty-eight".