838687439016 has 144 divisors (see below), whose sum is σ = 2644308250740. Its totient is φ = 239442255360.

The previous prime is 838687438909. The next prime is 838687439053. The reversal of 838687439016 is 610934786838.

838687439016 is a `hidden beast` number, since 83 + 86 + 87 + 4 + 390 + 16 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 832565002500 + 6122436516 = 912450^2 + 78246^2 .

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4570510 + ... + 4750466.

Almost surely, 2^838687439016 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 838687439016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1322154125370).

838687439016 is an abundant number, since it is smaller than the sum of its proper divisors (1805620811724).

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

838687439016 is a wasteful number, since it uses less digits than its factorization.

838687439016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181304 (or 181290 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 63.

The spelling of 838687439016 in words is "eight hundred thirty-eight billion, six hundred eighty-seven million, four hundred thirty-nine thousand, sixteen".