840902 has 8 divisors (see below), whose sum is σ = 1327800. Its totient is φ = 398304.

The previous prime is 840863. The next prime is 840907. The reversal of 840902 is 209048.

840902 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840907) by changing a digit.

840902 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11027 + ... + 11102.

It is an arithmetic number, because the mean of its divisors is an integer number (165975).

2⁸⁴⁰⁹⁰² is an apocalyptic number.

840902 is a deficient number, since it is larger than the sum of its proper divisors (486898).

840902 is a wasteful number, since it uses less digits than its factorization.

840902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22150.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 840902 is about 917.0070883041. The cubic root of 840902 is about 94.3876402232.

The spelling of 840902 in words is "eight hundred forty thousand, nine hundred two".