223663640 has 64 divisors (see below), whose sum is σ = 520106400. Its totient is φ = 86510592.

The previous prime is 223663639. The next prime is 223663681. The reversal of 223663640 is 46366322.

It is a junction number, because it is equal to n+sod(n) for n = 223663597 and 223663606.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 186884 + ... + 188076.

Almost surely, 2^223663640 is an apocalyptic number.

223663640 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 223663640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260053200).

223663640 is an abundant number, since it is smaller than the sum of its proper divisors (296442760).

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

223663640 is a wasteful number, since it uses less digits than its factorization.

223663640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356 (or 1352 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 223663640 is about 14955.3883266199. The cubic root of 223663640 is about 607.0136578471.

The spelling of 223663640 in words is "two hundred twenty-three million, six hundred sixty-three thousand, six hundred forty".