646786092 has 24 divisors (see below), whose sum is σ = 1510657456. Its totient is φ = 215382528.

The previous prime is 646786079. The next prime is 646786093. The reversal of 646786092 is 290687646.

It is not an unprimeable number, because it can be changed into a prime (646786093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13693 + ... + 38484.

Almost surely, 2^646786092 is an apocalyptic number.

It is an amenable number.

646786092 is an abundant number, since it is smaller than the sum of its proper divisors (863871364).

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

646786092 is a wasteful number, since it uses less digits than its factorization.

646786092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53217 (or 53215 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 48.

The square root of 646786092 is about 25431.9895407339. The cubic root of 646786092 is about 864.8090469156.

The spelling of 646786092 in words is "six hundred forty-six million, seven hundred eighty-six thousand, ninety-two".