1223126844 has 96 divisors (see below), whose sum is σ = 3048192000. Its totient is φ = 380918208.

The previous prime is 1223126837. The next prime is 1223126929. The reversal of 1223126844 is 4486213221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2450907 + ... + 2451405.

It is an arithmetic number, because the mean of its divisors is an integer number (31752000).

Almost surely, 2^1223126844 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223126844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1524096000).

1223126844 is an abundant number, since it is smaller than the sum of its proper divisors (1825065156).

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

1223126844 is a wasteful number, since it uses less digits than its factorization.

1223126844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719 (or 717 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 1223126844 is about 34973.2303912578. The cubic root of 1223126844 is about 1069.4418272561.

The spelling of 1223126844 in words is "one billion, two hundred twenty-three million, one hundred twenty-six thousand, eight hundred forty-four".