646025704 has 16 divisors (see below), whose sum is σ = 1282551300. Its totient is φ = 304012032.

The previous prime is 646025701. The next prime is 646025719. The reversal of 646025704 is 407520646.

It can be written as a sum of positive squares in 2 ways, for example, as 645668100 + 357604 = 25410^2 + 598^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 646025704.

It is not an unprimeable number, because it can be changed into a prime (646025701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2374959 + ... + 2375230.

Almost surely, 2^646025704 is an apocalyptic number.

It is an amenable number.

646025704 is a deficient number, since it is larger than the sum of its proper divisors (636525596).

646025704 is a wasteful number, since it uses less digits than its factorization.

646025704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4750212 (or 4750208 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 646025704 is about 25417.0357044247. The cubic root of 646025704 is about 864.4700124729.

The spelling of 646025704 in words is "six hundred forty-six million, twenty-five thousand, seven hundred four".