638469048 has 64 divisors (see below), whose sum is σ = 1827740160. Its totient is φ = 182065536.

The previous prime is 638469047. The next prime is 638469049. The reversal of 638469048 is 840964836.

It is an interprime number because it is at equal distance from previous prime (638469047) and next prime (638469049).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 638468988 and 638469006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638469047) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 90165 + ... + 96987.

It is an arithmetic number, because the mean of its divisors is an integer number (28558440).

Almost surely, 2^638469048 is an apocalyptic number.

It is an amenable number.

638469048 is an abundant number, since it is smaller than the sum of its proper divisors (1189271112).

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

638469048 is a wasteful number, since it uses less digits than its factorization.

638469048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7396 (or 7392 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 48.

The square root of 638469048 is about 25267.9450688021. The cubic root of 638469048 is about 861.0861740137.

The spelling of 638469048 in words is "six hundred thirty-eight million, four hundred sixty-nine thousand, forty-eight".