862840 has 64 divisors (see below), whose sum is σ = 2216160. Its totient is φ = 299520.

The previous prime is 862819. The next prime is 862861. The reversal of 862840 is 48268.

862840 = T₈ + T₉ + ... + T₁₇₂.

862840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (862819) and next prime (862861).

It is a junction number, because it is equal to n+sod(n) for n = 862799 and 862808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16254 + ... + 16306.

2⁸⁶²⁸⁴⁰ 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 862840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1108080).

862840 is an abundant number, since it is smaller than the sum of its proper divisors (1353320).

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

862840 is a wasteful number, since it uses less digits than its factorization.

862840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 862840 is about 928.8918128609. The cubic root of 862840 is about 95.2014193701.

It can be divided in two parts, 8628 and 40, that added together give a palindrome (8668).

The spelling of 862840 in words is "eight hundred sixty-two thousand, eight hundred forty".