123223045440 has 224 divisors, whose sum is σ = 427370955264. Its totient is φ = 29832284160.

The previous prime is 123223045411. The next prime is 123223045459. The reversal of 123223045440 is 44540322321.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 123223045398 and 123223045407.

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, 8303307 + ... + 8318133.

Almost surely, 2^123223045440 is an apocalyptic number.

123223045440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123223045440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213685477632).

123223045440 is an abundant number, since it is smaller than the sum of its proper divisors (304147909824).

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

123223045440 is a wasteful number, since it uses less digits than its factorization.

123223045440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15645 (or 15635 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 123223045440 its reverse (44540322321), we get a palindrome (167763367761).

The spelling of 123223045440 in words is "one hundred twenty-three billion, two hundred twenty-three million, forty-five thousand, four hundred forty".