638008383 has 8 divisors (see below), whose sum is σ = 857172096. Its totient is φ = 422091800.

The previous prime is 638008373. The next prime is 638008403. The reversal of 638008383 is 383800836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 638008383 - 2¹⁶ = 637942847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638008313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 811323 + ... + 812108.

It is an arithmetic number, because the mean of its divisors is an integer number (107146512).

Almost surely, 2^638008383 is an apocalyptic number.

638008383 is a deficient number, since it is larger than the sum of its proper divisors (219163713).

638008383 is a wasteful number, since it uses less digits than its factorization.

638008383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623565.

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

The square root of 638008383 is about 25258.8278231592. The cubic root of 638008383 is about 860.8790286538.

The spelling of 638008383 in words is "six hundred thirty-eight million, eight thousand, three hundred eighty-three".