646098628 has 24 divisors (see below), whose sum is σ = 1292905152. Its totient is φ = 276747744.

The previous prime is 646098601. The next prime is 646098637. The reversal of 646098628 is 826890646.

It is an unprimeable number.

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, 56751 + ... + 67177.

It is an arithmetic number, because the mean of its divisors is an integer number (53871048).

Almost surely, 2^646098628 is an apocalyptic number.

It is an amenable number.

646098628 is an abundant number, since it is smaller than the sum of its proper divisors (646806524).

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

646098628 is a wasteful number, since it uses less digits than its factorization.

646098628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12651 (or 12649 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 49.

The square root of 646098628 is about 25418.4702136065. The cubic root of 646098628 is about 864.5025386500.

It can be divided in two parts, 64609 and 8628, that added together give a palindrome (73237).

The spelling of 646098628 in words is "six hundred forty-six million, ninety-eight thousand, six hundred twenty-eight".