634501780 has 48 divisors (see below), whose sum is σ = 1466506944. Its totient is φ = 228677120.

The previous prime is 634501771. The next prime is 634501783. The reversal of 634501780 is 87105436.

634501780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634501783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12099 + ... + 37621.

It is an arithmetic number, because the mean of its divisors is an integer number (30552228).

Almost surely, 2^634501780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634501780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (733253472).

634501780 is an abundant number, since it is smaller than the sum of its proper divisors (832005164).

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

634501780 is a wasteful number, since it uses less digits than its factorization.

634501780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25656 (or 25654 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 634501780 is about 25189.3187680810. The cubic root of 634501780 is about 859.2989509431.

The spelling of 634501780 in words is "six hundred thirty-four million, five hundred one thousand, seven hundred eighty".