223820538 has 16 divisors (see below), whose sum is σ = 473973120. Its totient is φ = 70218176.

The previous prime is 223820507. The next prime is 223820563. The reversal of 223820538 is 835028322.

It is a junction number, because it is equal to n+sod(n) for n = 223820499 and 223820508.

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, 1097058 + ... + 1097261.

It is an arithmetic number, because the mean of its divisors is an integer number (29623320).

Almost surely, 2^223820538 is an apocalyptic number.

223820538 is an abundant number, since it is smaller than the sum of its proper divisors (250152582).

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

223820538 is a wasteful number, since it uses less digits than its factorization.

223820538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2194341.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 223820538 is about 14960.6329411559. The cubic root of 223820538 is about 607.1555628490.

The spelling of 223820538 in words is "two hundred twenty-three million, eight hundred twenty thousand, five hundred thirty-eight".