223440729 has 8 divisors (see below), whose sum is σ = 302970720. Its totient is φ = 146435616.

The previous prime is 223440727. The next prime is 223440751. The reversal of 223440729 is 927044322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 223440729 - 2¹ = 223440727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 223440729.

It is not an unprimeable number, because it can be changed into a prime (223440727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631012 + ... + 631365.

It is an arithmetic number, because the mean of its divisors is an integer number (37871340).

Almost surely, 2^223440729 is an apocalyptic number.

It is an amenable number.

223440729 is a deficient number, since it is larger than the sum of its proper divisors (79529991).

223440729 is a wasteful number, since it uses less digits than its factorization.

223440729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262439.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 223440729 is about 14947.9339375045. The cubic root of 223440729 is about 606.8119338089.

The spelling of 223440729 in words is "two hundred twenty-three million, four hundred forty thousand, seven hundred twenty-nine".