438462639 has 48 divisors (see below), whose sum is σ = 721593600. Its totient is φ = 264819456.

The previous prime is 438462581. The next prime is 438462641. The reversal of 438462639 is 936264834.

438462639 is a `hidden beast` number, since 4 + 3 + 8 + 4 + 6 + 2 + 639 = 666.

It is not a de Polignac number, because 438462639 - 2⁷ = 438462511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 438462594 and 438462603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438460639) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 104127 + ... + 108255.

It is an arithmetic number, because the mean of its divisors is an integer number (15033200).

Almost surely, 2^438462639 is an apocalyptic number.

438462639 is a deficient number, since it is larger than the sum of its proper divisors (283130961).

438462639 is a wasteful number, since it uses less digits than its factorization.

438462639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4186 (or 4174 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The square root of 438462639 is about 20939.4994925858. The cubic root of 438462639 is about 759.7036234724.

The spelling of 438462639 in words is "four hundred thirty-eight million, four hundred sixty-two thousand, six hundred thirty-nine".