223239978 has 48 divisors (see below), whose sum is σ = 543553920. Its totient is φ = 65701152.

The previous prime is 223239953. The next prime is 223239983. The reversal of 223239978 is 879932322.

It is a super-3 number, since 3×223239978³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15358 + ... + 26121.

It is an arithmetic number, because the mean of its divisors is an integer number (11324040).

Almost surely, 2^223239978 is an apocalyptic number.

223239978 is an abundant number, since it is smaller than the sum of its proper divisors (320313942).

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

223239978 is a wasteful number, since it uses less digits than its factorization.

223239978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41523 (or 41520 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 223239978 is about 14941.2174202774. The cubic root of 223239978 is about 606.6301486827.

It can be divided in two parts, 22 and 3239978, that added together give a square (3240000 = 1800²).

The spelling of 223239978 in words is "two hundred twenty-three million, two hundred thirty-nine thousand, nine hundred seventy-eight".