223897128 has 128 divisors (see below), whose sum is σ = 711352320. Its totient is φ = 57127680.

The previous prime is 223897127. The next prime is 223897189. The reversal of 223897128 is 821798322.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 223897128.

It is not an unprimeable number, because it can be changed into a prime (223897127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66051 + ... + 69357.

It is an arithmetic number, because the mean of its divisors is an integer number (5557440).

Almost surely, 2^223897128 is an apocalyptic number.

223897128 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 223897128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (355676160).

223897128 is an abundant number, since it is smaller than the sum of its proper divisors (487455192).

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

223897128 is a wasteful number, since it uses less digits than its factorization.

223897128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3367 (or 3363 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 223897128 is about 14963.1924401179. The cubic root of 223897128 is about 607.2248099070.

The spelling of 223897128 in words is "two hundred twenty-three million, eight hundred ninety-seven thousand, one hundred twenty-eight".