1280998403344 has 135 divisors (see below), whose sum is σ = 2828581045381. Its totient is φ = 561559841920.

The previous prime is 1280998403303. The next prime is 1280998403389. The reversal of 1280998403344 is 4433048990821.

The square root of 1280998403344 is 1131812.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 671724489744 + 609273913600 = 819588^2 + 780560^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1444191669 + ... + 1444192555.

Almost surely, 2^{1280998403344} is an apocalyptic number.

1280998403344 is the 1131812-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1280998403344

1280998403344 is an abundant number, since it is smaller than the sum of its proper divisors (1547582642037).

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

1280998403344 is an frugal number, since it uses more digits than its factorization.

1280998403344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1862 (or 929 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 55.

The spelling of 1280998403344 in words is "one trillion, two hundred eighty billion, nine hundred ninety-eight million, four hundred three thousand, three hundred forty-four".