438787878912 has 156 divisors (see below), whose sum is σ = 1270658231544. Its totient is φ = 145892966400.

The previous prime is 438787878889. The next prime is 438787878923. The reversal of 438787878912 is 219878787834.

438787878912 is a `hidden beast` number, since 4 + 387 + 87 + 87 + 8 + 91 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14767623 + ... + 14797305.

It is an arithmetic number, because the mean of its divisors is an integer number (8145245074).

Almost surely, 2^438787878912 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 438787878912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635329115772).

438787878912 is an abundant number, since it is smaller than the sum of its proper divisors (831870352632).

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

438787878912 is a wasteful number, since it uses less digits than its factorization.

438787878912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30114 (or 30089 counting only the distinct ones).

The product of its digits is 303464448, while the sum is 72.

The spelling of 438787878912 in words is "four hundred thirty-eight billion, seven hundred eighty-seven million, eight hundred seventy-eight thousand, nine hundred twelve".