223420278 has 16 divisors (see below), whose sum is σ = 470358720. Its totient is φ = 70553736.

The previous prime is 223420271. The next prime is 223420279. The reversal of 223420278 is 872024322.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223420271) 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, 979800 + ... + 980027.

It is an arithmetic number, because the mean of its divisors is an integer number (29397420).

Almost surely, 2^223420278 is an apocalyptic number.

223420278 is an abundant number, since it is smaller than the sum of its proper divisors (246938442).

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

223420278 is a wasteful number, since it uses less digits than its factorization.

223420278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1959851.

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 223420278 is about 14947.2498473800. The cubic root of 223420278 is about 606.7934198917.

The spelling of 223420278 in words is "two hundred twenty-three million, four hundred twenty thousand, two hundred seventy-eight".