840672768 has 80 divisors (see below), whose sum is σ = 2411939376. Its totient is φ = 258662400.

The previous prime is 840672761. The next prime is 840672773. The reversal of 840672768 is 867276048.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840672761) 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 7 ways as a sum of consecutive naturals, for example, 1083 + ... + 41018.

Almost surely, 2^840672768 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 840672768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1205969688).

840672768 is an abundant number, since it is smaller than the sum of its proper divisors (1571266608).

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

840672768 is a wasteful number, since it uses less digits than its factorization.

840672768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42135 (or 42119 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 48.

The square root of 840672768 is about 28994.3575200417. The cubic root of 840672768 is about 943.7906267440.

The spelling of 840672768 in words is "eight hundred forty million, six hundred seventy-two thousand, seven hundred sixty-eight".