1238636280832 has 198 divisors, whose sum is σ = 2661502391072. Its totient is φ = 576038240256.

The previous prime is 1238636280811. The next prime is 1238636280841. The reversal of 1238636280832 is 2380826368321.

It is a super-2 number, since 2×1238636280832² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1238636280832.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5554422673 + ... + 5554422895.

Almost surely, 2^{1238636280832} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1238636280832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1330751195536).

1238636280832 is an abundant number, since it is smaller than the sum of its proper divisors (1422866110240).

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

1238636280832 is an equidigital number, since it uses as much as digits as its factorization.

1238636280832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 52.

The spelling of 1238636280832 in words is "one trillion, two hundred thirty-eight billion, six hundred thirty-six million, two hundred eighty thousand, eight hundred thirty-two".