840263 has 4 divisors (see below), whose sum is σ = 859848. Its totient is φ = 820680.

The previous prime is 840253. The next prime is 840269. The reversal of 840263 is 362048.

It is a happy number.

840263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840269) 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, 9728 + ... + 9813.

It is an arithmetic number, because the mean of its divisors is an integer number (214962).

2⁸⁴⁰²⁶³ is an apocalyptic number.

840263 is a deficient number, since it is larger than the sum of its proper divisors (19585).

840263 is a wasteful number, since it uses less digits than its factorization.

840263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19584.

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

The square root of 840263 is about 916.6586060252. The cubic root of 840263 is about 94.3637258289.

The spelling of 840263 in words is "eight hundred forty thousand, two hundred sixty-three".