634985650 has 48 divisors (see below), whose sum is σ = 1274543424. Its totient is φ = 233974080.

The previous prime is 634985639. The next prime is 634985669. The reversal of 634985650 is 56589436.

634985650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 634985650.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 534357 + ... + 535543.

It is an arithmetic number, because the mean of its divisors is an integer number (26552988).

Almost surely, 2^634985650 is an apocalyptic number.

634985650 is the 20575-th pentagonal number.

634985650 is an abundant number, since it is smaller than the sum of its proper divisors (639557774).

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

634985650 is a wasteful number, since it uses less digits than its factorization.

634985650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2035 (or 2030 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 46.

The square root of 634985650 is about 25198.9216039100. The cubic root of 634985650 is about 859.5173287569.

The spelling of 634985650 in words is "six hundred thirty-four million, nine hundred eighty-five thousand, six hundred fifty".