223539640 has 16 divisors (see below), whose sum is σ = 502964280. Its totient is φ = 89415840.

The previous prime is 223539629. The next prime is 223539649. The reversal of 223539640 is 46935322.

It is a junction number, because it is equal to n+sod(n) for n = 223539596 and 223539605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223539649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2794206 + ... + 2794285.

Almost surely, 2^223539640 is an apocalyptic number.

223539640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223539640 is an abundant number, since it is smaller than the sum of its proper divisors (279424640).

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

223539640 is a wasteful number, since it uses less digits than its factorization.

223539640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5588502 (or 5588498 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 223539640 is about 14951.2420888701. The cubic root of 223539640 is about 606.9014601920.

The spelling of 223539640 in words is "two hundred twenty-three million, five hundred thirty-nine thousand, six hundred forty".