840632 has 32 divisors (see below), whose sum is σ = 1738800. Its totient is φ = 378624.

The previous prime is 840611. The next prime is 840643. The reversal of 840632 is 236048.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 840598 and 840607.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 840632.

It is an unprimeable number.

840632 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 6068 + ... + 6204.

2⁸⁴⁰⁶³² 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 840632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (869400).

840632 is an abundant number, since it is smaller than the sum of its proper divisors (898168).

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

840632 is a wasteful number, since it uses less digits than its factorization.

840632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 840632 is about 916.8598584298. The cubic root of 840632 is about 94.3775370281.

The spelling of 840632 in words is "eight hundred forty thousand, six hundred thirty-two".