634928645 has 8 divisors (see below), whose sum is σ = 820523256. Its totient is φ = 468870336.

The previous prime is 634928641. The next prime is 634928653. The reversal of 634928645 is 546829436.

It can be written as a sum of positive squares in 4 ways, for example, as 9628609 + 625300036 = 3103^2 + 25006^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 634928645 - 2² = 634928641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 634928645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634928641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4884002 + ... + 4884131.

It is an arithmetic number, because the mean of its divisors is an integer number (102565407).

Almost surely, 2^634928645 is an apocalyptic number.

634928645 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

634928645 is a deficient number, since it is larger than the sum of its proper divisors (185594611).

634928645 is a wasteful number, since it uses less digits than its factorization.

634928645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9768151.

The product of its digits is 1244160, while the sum is 47.

The square root of 634928645 is about 25197.7904785320. The cubic root of 634928645 is about 859.4916073087.

The spelling of 634928645 in words is "six hundred thirty-four million, nine hundred twenty-eight thousand, six hundred forty-five".