1280235740000 has 720 divisors, whose sum is σ = 3834633836880. Its totient is φ = 418844160000.

The previous prime is 1280235739963. The next prime is 1280235740023. The reversal of 1280235740000 is 475320821.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 3040939790 + ... + 3040940210.

It is an arithmetic number, because the mean of its divisors is an integer number (5325880329).

Almost surely, 2^{1280235740000} is an apocalyptic number.

1280235740000 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 1280235740000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1917316918440).

1280235740000 is an abundant number, since it is smaller than the sum of its proper divisors (2554398096880).

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

1280235740000 is a wasteful number, since it uses less digits than its factorization.

1280235740000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601 (or 571 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The spelling of 1280235740000 in words is "one trillion, two hundred eighty billion, two hundred thirty-five million, seven hundred forty thousand".