638348125 has 40 divisors (see below), whose sum is σ = 842130432. Its totient is φ = 483000000.

The previous prime is 638348107. The next prime is 638348131. The reversal of 638348125 is 521843836.

638348125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 638348125 - 2¹¹ = 638346077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 910275 + ... + 910975.

Almost surely, 2^638348125 is an apocalyptic number.

It is an amenable number.

638348125 is a deficient number, since it is larger than the sum of its proper divisors (203782307).

638348125 is an equidigital number, since it uses as much as digits as its factorization.

638348125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799 (or 784 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 638348125 is about 25265.5521412060. The cubic root of 638348125 is about 861.0318087066.

The spelling of 638348125 in words is "six hundred thirty-eight million, three hundred forty-eight thousand, one hundred twenty-five".