438404550660 has 480 divisors, whose sum is σ = 1526697849600. Its totient is φ = 104748982272.

The previous prime is 438404550653. The next prime is 438404550691. The reversal of 438404550660 is 66055404834.

438404550660 is a `hidden beast` number, since 4 + 3 + 8 + 40 + 45 + 506 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 143784816 + ... + 143787864.

It is an arithmetic number, because the mean of its divisors is an integer number (3180620520).

Almost surely, 2^438404550660 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 438404550660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (763348924800).

438404550660 is an abundant number, since it is smaller than the sum of its proper divisors (1088293298940).

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

438404550660 is a wasteful number, since it uses less digits than its factorization.

438404550660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3337 (or 3326 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 45.

The spelling of 438404550660 in words is "four hundred thirty-eight billion, four hundred four million, five hundred fifty thousand, six hundred sixty".