1223429595840 has 672 divisors, whose sum is σ = 4623669086400. Its totient is φ = 295820328960.

The previous prime is 1223429595793. The next prime is 1223429595907. The reversal of 1223429595840 is 485959243221.

1223429595840 is a `hidden beast` number, since 1 + 2 + 2 + 3 + 4 + 2 + 9 + 59 + 584 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 118901416 + ... + 118911704.

It is an arithmetic number, because the mean of its divisors is an integer number (6880459950).

Almost surely, 2^{1223429595840} is an apocalyptic number.

1223429595840 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 1223429595840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2311834543200).

1223429595840 is an abundant number, since it is smaller than the sum of its proper divisors (3400239490560).

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

1223429595840 is a wasteful number, since it uses less digits than its factorization.

1223429595840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10425 (or 10412 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 1223429595840 in words is "one trillion, two hundred twenty-three billion, four hundred twenty-nine million, five hundred ninety-five thousand, eight hundred forty".