382438639 has 4 divisors (see below), whose sum is σ = 417205800. Its totient is φ = 347671480.

The previous prime is 382438583. The next prime is 382438663. The reversal of 382438639 is 936834283.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 382438639 - 2⁹ = 382438127 is a prime.

It is a super-3 number, since 3×382438639³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (382438439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17383564 + ... + 17383585.

It is an arithmetic number, because the mean of its divisors is an integer number (104301450).

Almost surely, 2^382438639 is an apocalyptic number.

382438639 is a deficient number, since it is larger than the sum of its proper divisors (34767161).

382438639 is a wasteful number, since it uses less digits than its factorization.

382438639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34767160.

The product of its digits is 746496, while the sum is 46.

The square root of 382438639 is about 19556.0384280662. The cubic root of 382438639 is about 725.8617665412.

The spelling of 382438639 in words is "three hundred eighty-two million, four hundred thirty-eight thousand, six hundred thirty-nine".