438782660420 has 24 divisors (see below), whose sum is σ = 992323863384. Its totient is φ = 162012059136.

The previous prime is 438782660417. The next prime is 438782660483. The reversal of 438782660420 is 24066287834.

It can be written as a sum of positive squares in 4 ways, for example, as 104566863424 + 334215796996 = 323368^2 + 578114^2 .

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, 843812549 + ... + 843813068.

It is an arithmetic number, because the mean of its divisors is an integer number (41346827641).

Almost surely, 2^438782660420 is an apocalyptic number.

It is an amenable number.

438782660420 is an abundant number, since it is smaller than the sum of its proper divisors (553541202964).

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

438782660420 is a wasteful number, since it uses less digits than its factorization.

438782660420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687625639 (or 1687625637 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 50.

The spelling of 438782660420 in words is "four hundred thirty-eight billion, seven hundred eighty-two million, six hundred sixty thousand, four hundred twenty".