638481452 has 24 divisors (see below), whose sum is σ = 1288684320. Its totient is φ = 271123200.

The previous prime is 638481439. The next prime is 638481463. The reversal of 638481452 is 254184836.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101549 + ... + 107652.

It is an arithmetic number, because the mean of its divisors is an integer number (53695180).

Almost surely, 2^638481452 is an apocalyptic number.

It is an amenable number.

638481452 is an abundant number, since it is smaller than the sum of its proper divisors (650202868).

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

638481452 is a wasteful number, since it uses less digits than its factorization.

638481452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209321 (or 209319 counting only the distinct ones).

The product of its digits is 184320, while the sum is 41.

The square root of 638481452 is about 25268.1905169325. The cubic root of 638481452 is about 861.0917502923.

The spelling of 638481452 in words is "six hundred thirty-eight million, four hundred eighty-one thousand, four hundred fifty-two".