646792 has 8 divisors (see below), whose sum is σ = 1212750. Its totient is φ = 323392.

The previous prime is 646781. The next prime is 646823. The reversal of 646792 is 297646.

646792 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., 527076 + 119716 = 726^2 + 346^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a nialpdrome in base 15.

It is an unprimeable number.

646792 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 as a sum of consecutive naturals, namely, 40417 + ... + 40432.

2⁶⁴⁶⁷⁹² is an apocalyptic number.

It is an amenable number.

646792 is a deficient number, since it is larger than the sum of its proper divisors (565958).

646792 is a wasteful number, since it uses less digits than its factorization.

646792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80855 (or 80851 counting only the distinct ones).

The product of its digits is 18144, while the sum is 34.

The square root of 646792 is about 804.2337968526. The cubic root of 646792 is about 86.4811680077.

The spelling of 646792 in words is "six hundred forty-six thousand, seven hundred ninety-two".