634565436 has 12 divisors (see below), whose sum is σ = 1480652712. Its totient is φ = 211521808.

The previous prime is 634565419. The next prime is 634565453.

It is a happy number.

634565436 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (634565419) and next prime (634565453).

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) 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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26440215 + ... + 26440238.

It is an arithmetic number, because the mean of its divisors is an integer number (123387726).

Almost surely, 2^634565436 is an apocalyptic number.

It is an amenable number.

634565436 is an abundant number, since it is smaller than the sum of its proper divisors (846087276).

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

634565436 is a wasteful number, since it uses less digits than its factorization.

634565436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52880460 (or 52880458 counting only the distinct ones).

The product of its digits is 777600, while the sum is 42.

The square root of 634565436 is about 25190.5822878313. The cubic root of 634565436 is about 859.3276861947.

The spelling of 634565436 in words is "six hundred thirty-four million, five hundred sixty-five thousand, four hundred thirty-six".