634769556 has 48 divisors (see below), whose sum is σ = 1560975360. Its totient is φ = 200210400.

The previous prime is 634769543. The next prime is 634769561. The reversal of 634769556 is 655967436.

It is a happy number.

Its product of digits (4082400) is a multiple of the sum of its prime divisors (3402).

It is a junction number, because it is equal to n+sod(n) for n = 634769499 and 634769508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324381 + ... + 326331.

It is an arithmetic number, because the mean of its divisors is an integer number (32520320).

Almost surely, 2^634769556 is an apocalyptic number.

It is an amenable number.

634769556 is an abundant number, since it is smaller than the sum of its proper divisors (926205804).

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

634769556 is a wasteful number, since it uses less digits than its factorization.

634769556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3404 (or 3402 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 51.

The square root of 634769556 is about 25194.6334761989. The cubic root of 634769556 is about 859.4198159963.

The spelling of 634769556 in words is "six hundred thirty-four million, seven hundred sixty-nine thousand, five hundred fifty-six".