1294394449920 has 896 divisors, whose sum is σ = 5123323215360. Its totient is φ = 274338938880.

The previous prime is 1294394449919. The next prime is 1294394449937. The reversal of 1294394449920 is 299444934921.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 333863022 + ... + 333866898.

It is an arithmetic number, because the mean of its divisors is an integer number (5717994660).

Almost surely, 2^{1294394449920} is an apocalyptic number.

1294394449920 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 1294394449920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2561661607680).

1294394449920 is an abundant number, since it is smaller than the sum of its proper divisors (3828928765440).

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

1294394449920 is a wasteful number, since it uses less digits than its factorization.

1294394449920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3954 (or 3930 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 60.

The spelling of 1294394449920 in words is "one trillion, two hundred ninety-four billion, three hundred ninety-four million, four hundred forty-nine thousand, nine hundred twenty".