867940 has 12 divisors (see below), whose sum is σ = 1822716. Its totient is φ = 347168.

The previous prime is 867913. The next prime is 867943. The reversal of 867940 is 49768.

867940 = T₁₈₈ + T₁₈₉ + ... + T₂₂₇.

It can be written as a sum of positive squares in 2 ways, for example, as 580644 + 287296 = 762^2 + 536^2 .

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 867896 and 867905.

It is not an unprimeable number, because it can be changed into a prime (867943) by changing a digit.

867940 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21679 + ... + 21718.

It is an arithmetic number, because the mean of its divisors is an integer number (151893).

2⁸⁶⁷⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

867940 is an abundant number, since it is smaller than the sum of its proper divisors (954776).

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

867940 is a wasteful number, since it uses less digits than its factorization.

867940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43406 (or 43404 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 867940 is about 931.6329749424. The cubic root of 867940 is about 95.3886204594.

The spelling of 867940 in words is "eight hundred sixty-seven thousand, nine hundred forty".