223870638 has 32 divisors (see below), whose sum is σ = 468043776. Its totient is φ = 71251488.

The previous prime is 223870627. The next prime is 223870639. The reversal of 223870638 is 836078322.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 223870596 and 223870605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223870639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103395 + ... + 105537.

It is an arithmetic number, because the mean of its divisors is an integer number (14626368).

Almost surely, 2^223870638 is an apocalyptic number.

223870638 is an abundant number, since it is smaller than the sum of its proper divisors (244173138).

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

223870638 is a wasteful number, since it uses less digits than its factorization.

223870638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2928.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 223870638 is about 14962.3072418661. The cubic root of 223870638 is about 607.2008613794.

The spelling of 223870638 in words is "two hundred twenty-three million, eight hundred seventy thousand, six hundred thirty-eight".