634804216 has 8 divisors (see below), whose sum is σ = 1190257920. Its totient is φ = 317402104.

The previous prime is 634804211. The next prime is 634804217. The reversal of 634804216 is 612408436.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×634804216³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634804211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39675256 + ... + 39675271.

It is an arithmetic number, because the mean of its divisors is an integer number (148782240).

Almost surely, 2^634804216 is an apocalyptic number.

It is an amenable number.

634804216 is a deficient number, since it is larger than the sum of its proper divisors (555453704).

634804216 is a wasteful number, since it uses less digits than its factorization.

634804216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79350533 (or 79350529 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 634804216 is about 25195.3213117039. The cubic root of 634804216 is about 859.4354578663.

The spelling of 634804216 in words is "six hundred thirty-four million, eight hundred four thousand, two hundred sixteen".