646634630 has 32 divisors (see below), whose sum is σ = 1182843648. Its totient is φ = 254469600.

The previous prime is 646634579. The next prime is 646634641. The reversal of 646634630 is 36436646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 575249 + ... + 576371.

It is an arithmetic number, because the mean of its divisors is an integer number (36963864).

Almost surely, 2^646634630 is an apocalyptic number.

646634630 is a deficient number, since it is larger than the sum of its proper divisors (536209018).

646634630 is a wasteful number, since it uses less digits than its factorization.

646634630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012.

The product of its (nonzero) digits is 186624, while the sum is 38.

The square root of 646634630 is about 25429.0115812628. The cubic root of 646634630 is about 864.7415357063.

The spelling of 646634630 in words is "six hundred forty-six million, six hundred thirty-four thousand, six hundred thirty".