438004989 has 10 divisors (see below), whose sum is σ = 654303870. Its totient is φ = 292003272.

The previous prime is 438004981. The next prime is 438004991. The reversal of 438004989 is 989400834.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 344399364 + 93605625 = 18558^2 + 9675^2 .

It is not a de Polignac number, because 438004989 - 2³ = 438004981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438004981) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2703654 + ... + 2703815.

It is an arithmetic number, because the mean of its divisors is an integer number (65430387).

Almost surely, 2^438004989 is an apocalyptic number.

It is an amenable number.

438004989 is a deficient number, since it is larger than the sum of its proper divisors (216298881).

438004989 is an equidigital number, since it uses as much as digits as its factorization.

438004989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5407481 (or 5407472 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 438004989 is about 20928.5687279374. The cubic root of 438004989 is about 759.4392152372.

The spelling of 438004989 in words is "four hundred thirty-eight million, four thousand, nine hundred eighty-nine".