834640 has 20 divisors (see below), whose sum is σ = 1940724. Its totient is φ = 333824.

The previous prime is 834629. The next prime is 834641. The reversal of 834640 is 46438.

It can be written as a sum of positive squares in 2 ways, for example, as 419904 + 414736 = 648^2 + 644^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (834641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5137 + ... + 5296.

2⁸³⁴⁶⁴⁰ is an apocalyptic number.

834640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

834640 is an abundant number, since it is smaller than the sum of its proper divisors (1106084).

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

834640 is a wasteful number, since it uses less digits than its factorization.

834640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10446 (or 10440 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 834640 is about 913.5863396527. The cubic root of 834640 is about 94.1527620197.

The spelling of 834640 in words is "eight hundred thirty-four thousand, six hundred forty".