438023904 has 96 divisors (see below), whose sum is σ = 1223631360. Its totient is φ = 136722432.

The previous prime is 438023903. The next prime is 438023909. The reversal of 438023904 is 409320834.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438023903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 389487 + ... + 390609.

It is an arithmetic number, because the mean of its divisors is an integer number (12746160).

Almost surely, 2^438023904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 438023904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (611815680).

438023904 is an abundant number, since it is smaller than the sum of its proper divisors (785607456).

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

438023904 is a wasteful number, since it uses less digits than its factorization.

438023904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392 (or 1384 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 438023904 is about 20929.0206173151. The cubic root of 438023904 is about 759.4501470655.

The spelling of 438023904 in words is "four hundred thirty-eight million, twenty-three thousand, nine hundred four".