634388480 has 126 divisors (see below), whose sum is σ = 1673526498. Its totient is φ = 230686720.

The previous prime is 634388467. The next prime is 634388497. The reversal of 634388480 is 84883436.

It can be written as a sum of positive squares in only one way, i.e., 507510784 + 126877696 = 22528^2 + 11264^2 .

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 57671675 + ... + 57671685.

Almost surely, 2^634388480 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 634388480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (836763249).

634388480 is an abundant number, since it is smaller than the sum of its proper divisors (1039138018).

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

634388480 is an frugal number, since it uses more digits than its factorization.

634388480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The square root of 634388480 is about 25187.0696985576. The cubic root of 634388480 is about 859.2478009071.

The spelling of 634388480 in words is "six hundred thirty-four million, three hundred eighty-eight thousand, four hundred eighty".