438440467865 has 16 divisors (see below), whose sum is σ = 529566394320. Its totient is φ = 348461218560.

The previous prime is 438440467859. The next prime is 438440467891. The reversal of 438440467865 is 568764044834.

It can be written as a sum of positive squares in 8 ways, for example, as 3906375001 + 434534092864 = 62501^2 + 659192^2 .

It is not a de Polignac number, because 438440467865 - 2¹⁶ = 438440402329 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5123651 + ... + 5208519.

It is an arithmetic number, because the mean of its divisors is an integer number (33097899645).

Almost surely, 2^438440467865 is an apocalyptic number.

It is an amenable number.

438440467865 is a deficient number, since it is larger than the sum of its proper divisors (91125926455).

438440467865 is a wasteful number, since it uses less digits than its factorization.

438440467865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91612.

The product of its (nonzero) digits is 61931520, while the sum is 59.

The spelling of 438440467865 in words is "four hundred thirty-eight billion, four hundred forty million, four hundred sixty-seven thousand, eight hundred sixty-five".