842663744 has 70 divisors (see below), whose sum is σ = 1815432234. Its totient is φ = 388078080.

The previous prime is 842663743. The next prime is 842663749. The reversal of 842663744 is 447366248.

It can be written as a sum of positive squares in 5 ways, for example, as 766625344 + 76038400 = 27688^2 + 8720^2 .

It is a junction number, because it is equal to n+sod(n) for n = 842663695 and 842663704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842663743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1827674 + ... + 1828134.

Almost surely, 2^842663744 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 842663744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (907716117).

842663744 is an abundant number, since it is smaller than the sum of its proper divisors (972768490).

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

842663744 is an frugal number, since it uses more digits than its factorization.

842663744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525 (or 476 counting only the distinct ones).

The product of its digits is 774144, while the sum is 44.

The square root of 842663744 is about 29028.6710684454. The cubic root of 842663744 is about 944.5351031137.

The spelling of 842663744 in words is "eight hundred forty-two million, six hundred sixty-three thousand, seven hundred forty-four".