646492 has 24 divisors (see below), whose sum is σ = 1411200. Its totient is φ = 251760.

The previous prime is 646453. The next prime is 646519. The reversal of 646492 is 294646.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 646492.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 742 + ... + 1357.

It is an arithmetic number, because the mean of its divisors is an integer number (58800).

2⁶⁴⁶⁴⁹² is an apocalyptic number.

It is an amenable number.

646492 is an abundant number, since it is smaller than the sum of its proper divisors (764708).

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

646492 is a wasteful number, since it uses less digits than its factorization.

646492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121 (or 2119 counting only the distinct ones).

The product of its digits is 10368, while the sum is 31.

The square root of 646492 is about 804.0472622925. The cubic root of 646492 is about 86.4677951549.

It can be divided in two parts, 6464 and 92, that added together give a palindrome (6556).

The spelling of 646492 in words is "six hundred forty-six thousand, four hundred ninety-two".