646794 has 12 divisors (see below), whose sum is σ = 1401426. Its totient is φ = 215592.

The previous prime is 646781. The next prime is 646823. The reversal of 646794 is 497646.

646794 is a `hidden beast` number, since 646 + 7 + 9 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 497025 + 149769 = 705^2 + 387^2 .

It is a nialpdrome in base 15.

It is an unprimeable number.

646794 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 5 ways as a sum of consecutive naturals, for example, 17949 + ... + 17984.

2⁶⁴⁶⁷⁹⁴ is an apocalyptic number.

646794 is an abundant number, since it is smaller than the sum of its proper divisors (754632).

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

646794 is a wasteful number, since it uses less digits than its factorization.

646794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35941 (or 35938 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 646794 is about 804.2350402712. The cubic root of 646794 is about 86.4812571462.

It can be divided in two parts, 6467 and 94, that added together give a 8-th power (6561 = 3⁸).

The spelling of 646794 in words is "six hundred forty-six thousand, seven hundred ninety-four".