438529940 has 24 divisors (see below), whose sum is σ = 922142760. Its totient is φ = 175177728.

The previous prime is 438529939. The next prime is 438529961. The reversal of 438529940 is 49925834.

It can be written as a sum of positive squares in 4 ways, for example, as 123254404 + 315275536 = 11102^2 + 17756^2 .

It is a junction number, because it is equal to n+sod(n) for n = 438529891 and 438529900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1124 + ... + 29636.

It is an arithmetic number, because the mean of its divisors is an integer number (38422615).

Almost surely, 2^438529940 is an apocalyptic number.

It is an amenable number.

438529940 is an abundant number, since it is smaller than the sum of its proper divisors (483612820).

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

438529940 is a wasteful number, since it uses less digits than its factorization.

438529940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29291 (or 29289 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 438529940 is about 20941.1064655142. The cubic root of 438529940 is about 759.7424912445.

The spelling of 438529940 in words is "four hundred thirty-eight million, five hundred twenty-nine thousand, nine hundred forty".