840676 has 6 divisors (see below), whose sum is σ = 1471190. Its totient is φ = 420336.

The previous prime is 840661. The next prime is 840683. The reversal of 840676 is 676048.

It can be written as a sum of positive squares in only one way, i.e., 527076 + 313600 = 726^2 + 560^2 .

It is a super-2 number, since 2×840676² = 1413472273952, which contains 22 as substring.

It is an unprimeable 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 as a sum of consecutive naturals, namely, 105081 + ... + 105088.

2⁸⁴⁰⁶⁷⁶ is an apocalyptic number.

It is an amenable number.

840676 is a deficient number, since it is larger than the sum of its proper divisors (630514).

840676 is a wasteful number, since it uses less digits than its factorization.

840676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210173 (or 210171 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 840676 is about 916.8838530588. The cubic root of 840676 is about 94.3791836223.

The spelling of 840676 in words is "eight hundred forty thousand, six hundred seventy-six".