223691028 has 96 divisors (see below), whose sum is σ = 607488000. Its totient is φ = 63348480.

The previous prime is 223690979. The next prime is 223691029. The reversal of 223691028 is 820196322.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 223691028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223691029) 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 31 ways as a sum of consecutive naturals, for example, 197568 + ... + 198696.

It is an arithmetic number, because the mean of its divisors is an integer number (6328000).

Almost surely, 2^223691028 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 223691028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303744000).

223691028 is an abundant number, since it is smaller than the sum of its proper divisors (383796972).

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

223691028 is a wasteful number, since it uses less digits than its factorization.

223691028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245 (or 1243 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 223691028 is about 14956.3039551889. The cubic root of 223691028 is about 607.0384334603.

The spelling of 223691028 in words is "two hundred twenty-three million, six hundred ninety-one thousand, twenty-eight".