1223538864 has 20 divisors (see below), whose sum is σ = 3160808856. Its totient is φ = 407846272.

The previous prime is 1223538863. The next prime is 1223538871. The reversal of 1223538864 is 4688353221.

It is not an unprimeable number, because it can be changed into a prime (1223538863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12745149 + ... + 12745244.

Almost surely, 2^1223538864 is an apocalyptic number.

It is an amenable number.

1223538864 is an abundant number, since it is smaller than the sum of its proper divisors (1937269992).

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

1223538864 is a wasteful number, since it uses less digits than its factorization.

1223538864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25490404 (or 25490398 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The square root of 1223538864 is about 34979.1204006047. The cubic root of 1223538864 is about 1069.5618971018.

The spelling of 1223538864 in words is "one billion, two hundred twenty-three million, five hundred thirty-eight thousand, eight hundred sixty-four".