1223385638 has 16 divisors (see below), whose sum is σ = 1864159920. Its totient is φ = 602054496.

The previous prime is 1223385613. The next prime is 1223385659. The reversal of 1223385638 is 8365833221.

It is a junction number, because it is equal to n+sod(n) for n = 1223385595 and 1223385604.

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, 30956 + ... + 58352.

It is an arithmetic number, because the mean of its divisors is an integer number (116509995).

Almost surely, 2^1223385638 is an apocalyptic number.

1223385638 is a deficient number, since it is larger than the sum of its proper divisors (640774282).

1223385638 is a wasteful number, since it uses less digits than its factorization.

1223385638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27751.

The product of its digits is 207360, while the sum is 41.

The square root of 1223385638 is about 34976.9300825558. The cubic root of 1223385638 is about 1069.5172475099.

The spelling of 1223385638 in words is "one billion, two hundred twenty-three million, three hundred eighty-five thousand, six hundred thirty-eight".