840732768 has 36 divisors (see below), whose sum is σ = 2390834628. Its totient is φ = 280244160.

The previous prime is 840732727. The next prime is 840732791. The reversal of 840732768 is 867237048.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1459318 + ... + 1459893.

It is an arithmetic number, because the mean of its divisors is an integer number (66412073).

Almost surely, 2^840732768 is an apocalyptic number.

It is an amenable number.

840732768 is an abundant number, since it is smaller than the sum of its proper divisors (1550101860).

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

840732768 is a wasteful number, since it uses less digits than its factorization.

840732768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2919227 (or 2919216 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 840732768 is about 28995.3921856560. The cubic root of 840732768 is about 943.8130794321.

The spelling of 840732768 in words is "eight hundred forty million, seven hundred thirty-two thousand, seven hundred sixty-eight".