438005156872 has 24 divisors (see below), whose sum is σ = 824894267310. Its totient is φ = 218037604160.

The previous prime is 438005156851. The next prime is 438005156891. The reversal of 438005156872 is 278651500834.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 364050529956 + 73954626916 = 603366^2 + 271946^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119029 + ... + 943492.

Almost surely, 2^438005156872 is an apocalyptic number.

It is an amenable number.

438005156872 is a deficient number, since it is larger than the sum of its proper divisors (386889110438).

438005156872 is a wasteful number, since it uses less digits than its factorization.

438005156872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062981 (or 1062750 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 438005156872 in words is "four hundred thirty-eight billion, five million, one hundred fifty-six thousand, eight hundred seventy-two".