840700 has 36 divisors (see below), whose sum is σ = 2086672. Its totient is φ = 288000.

The previous prime is 840683. The next prime is 840703. The reversal of 840700 is 7048.

It is a happy number.

840700 is an esthetic number in base 7, because in such base its adjacent digits differ by 1.

840700 is an undulating number in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840703) by changing a digit.

840700 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 (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100 + ... + 1300.

2⁸⁴⁰⁷⁰⁰ 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 840700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1043336).

840700 is an abundant number, since it is smaller than the sum of its proper divisors (1245972).

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

840700 is a wasteful number, since it uses less digits than its factorization.

840700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222 (or 1215 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 840700 is about 916.8969407736. The cubic root of 840700 is about 94.3800817403.

Adding to 840700 its reverse (7048), we get a palindrome (847748).

It can be divided in two parts, 840 and 700, that added together give a triangular number (1540 = T₅₅).

The spelling of 840700 in words is "eight hundred forty thousand, seven hundred".