438289453520 has 40 divisors (see below), whose sum is σ = 1078965510984. Its totient is φ = 165003087872.

The previous prime is 438289453513. The next prime is 438289453529. The reversal of 438289453520 is 25354982834.

It can be written as a sum of positive squares in 4 ways, for example, as 12084165184 + 426205288336 = 109928^2 + 652844^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438289453529) 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, 161134469 + ... + 161137188.

Almost surely, 2^438289453520 is an apocalyptic number.

438289453520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

438289453520 is an abundant number, since it is smaller than the sum of its proper divisors (640676057464).

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

438289453520 is a wasteful number, since it uses less digits than its factorization.

438289453520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322271687 (or 322271681 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 53.

The spelling of 438289453520 in words is "four hundred thirty-eight billion, two hundred eighty-nine million, four hundred fifty-three thousand, five hundred twenty".