223870 has 16 divisors (see below), whose sum is σ = 410688. Its totient is φ = 87840.

The previous prime is 223849. The next prime is 223903. The reversal of 223870 is 78322.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427 + ... + 793.

It is an arithmetic number, because the mean of its divisors is an integer number (25668).

2²²³⁸⁷⁰ is an apocalyptic number.

223870 is a deficient number, since it is larger than the sum of its proper divisors (186818).

223870 is a wasteful number, since it uses less digits than its factorization.

223870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 223870 is about 473.1490251496. The cubic root of 223870 is about 60.7200284566.

The spelling of 223870 in words is "two hundred twenty-three thousand, eight hundred seventy".