223945020 has 384 divisors, whose sum is σ = 835430400. Its totient is φ = 49268736.

The previous prime is 223945019. The next prime is 223945027. The reversal of 223945020 is 20549322.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223945027) 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 127 ways as a sum of consecutive naturals, for example, 3067704 + ... + 3067776.

It is an arithmetic number, because the mean of its divisors is an integer number (2175600).

Almost surely, 2^223945020 is an apocalyptic number.

223945020 is a gapful number since it is divisible by the number (20) 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 223945020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (417715200).

223945020 is an abundant number, since it is smaller than the sum of its proper divisors (611485380).

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

223945020 is a wasteful number, since it uses less digits than its factorization.

223945020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 223945020 is about 14964.7926814908. The cubic root of 223945020 is about 607.2681023148.

The spelling of 223945020 in words is "two hundred twenty-three million, nine hundred forty-five thousand, twenty".