646883634 has 16 divisors (see below), whose sum is σ = 1335502080. Its totient is φ = 208672080.

The previous prime is 646883563. The next prime is 646883641. The reversal of 646883634 is 436388646.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1738749 + ... + 1739120.

It is an arithmetic number, because the mean of its divisors is an integer number (83468880).

Almost surely, 2^646883634 is an apocalyptic number.

646883634 is an abundant number, since it is smaller than the sum of its proper divisors (688618446).

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

646883634 is a wasteful number, since it uses less digits than its factorization.

646883634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3477905.

The product of its digits is 1990656, while the sum is 48.

The square root of 646883634 is about 25433.9071713333. The cubic root of 646883634 is about 864.8525187656.

The spelling of 646883634 in words is "six hundred forty-six million, eight hundred eighty-three thousand, six hundred thirty-four".