1223868020 has 12 divisors (see below), whose sum is σ = 2570122884. Its totient is φ = 489547200.

The previous prime is 1223868013. The next prime is 1223868043. The reversal of 1223868020 is 208683221.

It can be written as a sum of positive squares in 2 ways, for example, as 653518096 + 570349924 = 25564^2 + 23882^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30596681 + ... + 30596720.

It is an arithmetic number, because the mean of its divisors is an integer number (214176907).

Almost surely, 2^1223868020 is an apocalyptic number.

1223868020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223868020 is an abundant number, since it is smaller than the sum of its proper divisors (1346254864).

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

1223868020 is a wasteful number, since it uses less digits than its factorization.

1223868020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61193410 (or 61193408 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 1223868020 is about 34983.8251196178. The cubic root of 1223868020 is about 1069.6577995590.

The spelling of 1223868020 in words is "one billion, two hundred twenty-three million, eight hundred sixty-eight thousand, twenty".