223028988 has 144 divisors (see below), whose sum is σ = 659594880. Its totient is φ = 58133376.

The previous prime is 223028983. The next prime is 223028989. The reversal of 223028988 is 889820322.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223028983) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1245883 + ... + 1246061.

It is an arithmetic number, because the mean of its divisors is an integer number (4580520).

Almost surely, 2^223028988 is an apocalyptic number.

223028988 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 223028988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329797440).

223028988 is an abundant number, since it is smaller than the sum of its proper divisors (436565892).

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

223028988 is a wasteful number, since it uses less digits than its factorization.

223028988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 223028988 is about 14934.1550815572. The cubic root of 223028988 is about 606.4389743830.

The spelling of 223028988 in words is "two hundred twenty-three million, twenty-eight thousand, nine hundred eighty-eight".