638103648 has 96 divisors (see below), whose sum is σ = 2061593856. Its totient is φ = 168288768.

The previous prime is 638103647. The next prime is 638103671. The reversal of 638103648 is 846301836.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638103647) 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, 27786 + ... + 45257.

It is an arithmetic number, because the mean of its divisors is an integer number (21474936).

Almost surely, 2^638103648 is an apocalyptic number.

It is an amenable number.

638103648 is an abundant number, since it is smaller than the sum of its proper divisors (1423490208).

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

638103648 is a wasteful number, since it uses less digits than its factorization.

638103648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73076 (or 73068 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 638103648 is about 25260.7135291147. The cubic root of 638103648 is about 860.9218742555.

The spelling of 638103648 in words is "six hundred thirty-eight million, one hundred three thousand, six hundred forty-eight".