223929918 has 12 divisors (see below), whose sum is σ = 485181528. Its totient is φ = 74643300.

The previous prime is 223929913. The next prime is 223929919. The reversal of 223929918 is 819929322.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223929913) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6220258 + ... + 6220293.

It is an arithmetic number, because the mean of its divisors is an integer number (40431794).

Almost surely, 2^223929918 is an apocalyptic number.

223929918 is an abundant number, since it is smaller than the sum of its proper divisors (261251610).

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

223929918 is a wasteful number, since it uses less digits than its factorization.

223929918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12440559 (or 12440556 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 223929918 is about 14964.2880886462. The cubic root of 223929918 is about 607.2544513912.

The spelling of 223929918 in words is "two hundred twenty-three million, nine hundred twenty-nine thousand, nine hundred eighteen".