223864640 has 56 divisors (see below), whose sum is σ = 550298112. Its totient is φ = 86653440.

The previous prime is 223864607. The next prime is 223864657. The reversal of 223864640 is 46468322.

It is a self number, because there is not a number n which added to its sum of digits gives 223864640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1364 + ... + 21203.

It is an arithmetic number, because the mean of its divisors is an integer number (9826752).

Almost surely, 2^223864640 is an apocalyptic number.

223864640 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 223864640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275149056).

223864640 is an abundant number, since it is smaller than the sum of its proper divisors (326433472).

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

223864640 is a wasteful number, since it uses less digits than its factorization.

223864640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22615 (or 22605 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 35.

The square root of 223864640 is about 14962.1068035220. The cubic root of 223864640 is about 607.1954385701.

The spelling of 223864640 in words is "two hundred twenty-three million, eight hundred sixty-four thousand, six hundred forty".