840916 has 6 divisors (see below), whose sum is σ = 1471610. Its totient is φ = 420456.

The previous prime is 840911. The next prime is 840923. The reversal of 840916 is 619048.

840916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 476100 + 364816 = 690^2 + 604^2 .

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 (840911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105111 + ... + 105118.

2⁸⁴⁰⁹¹⁶ is an apocalyptic number.

It is an amenable number.

840916 is a deficient number, since it is larger than the sum of its proper divisors (630694).

840916 is a wasteful number, since it uses less digits than its factorization.

840916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210233 (or 210231 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 840916 is about 917.0147218011. The cubic root of 840916 is about 94.3881640336.

The spelling of 840916 in words is "eight hundred forty thousand, nine hundred sixteen".