638413848 has 48 divisors (see below), whose sum is σ = 1730355120. Its totient is φ = 212642496.

The previous prime is 638413847. The next prime is 638413849. The reversal of 638413848 is 848314836.

638413848 is a `hidden beast` number, since 638 + 4 + 1 + 3 + 8 + 4 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (638413847) and next prime (638413849).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638413847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125890 + ... + 130862.

It is an arithmetic number, because the mean of its divisors is an integer number (36049065).

Almost surely, 2^638413848 is an apocalyptic number.

It is an amenable number.

638413848 is an abundant number, since it is smaller than the sum of its proper divisors (1091941272).

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

638413848 is a wasteful number, since it uses less digits than its factorization.

638413848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6768 (or 6761 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 638413848 is about 25266.8527521732. The cubic root of 638413848 is about 861.0613577094.

The spelling of 638413848 in words is "six hundred thirty-eight million, four hundred thirteen thousand, eight hundred forty-eight".