646298812 has 12 divisors (see below), whose sum is σ = 1133293000. Its totient is φ = 322500816.

The previous prime is 646298777. The next prime is 646298897. The reversal of 646298812 is 218892646.

It is a super-2 number, since 2×646298812² = 835404308785222688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159903 + ... + 163894.

Almost surely, 2^646298812 is an apocalyptic number.

It is an amenable number.

646298812 is a deficient number, since it is larger than the sum of its proper divisors (486994188).

646298812 is a wasteful number, since it uses less digits than its factorization.

646298812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324300 (or 324298 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

The square root of 646298812 is about 25422.4076751200. The cubic root of 646298812 is about 864.5918138259.

It can be divided in two parts, 64629 and 8812, that added together give a square (73441 = 271²).

The spelling of 646298812 in words is "six hundred forty-six million, two hundred ninety-eight thousand, eight hundred twelve".