438378109287 has 16 divisors (see below), whose sum is σ = 600391905792. Its totient is φ = 284347039680.

The previous prime is 438378109271. The next prime is 438378109297. The reversal of 438378109287 is 782901873834.

It is not a de Polignac number, because 438378109287 - 2⁴ = 438378109271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 438378109287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438378109297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4810513 + ... + 4900794.

It is an arithmetic number, because the mean of its divisors is an integer number (37524494112).

Almost surely, 2^438378109287 is an apocalyptic number.

438378109287 is a deficient number, since it is larger than the sum of its proper divisors (162013796505).

438378109287 is a wasteful number, since it uses less digits than its factorization.

438378109287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9711718.

The product of its (nonzero) digits is 16257024, while the sum is 60.

The spelling of 438378109287 in words is "four hundred thirty-eight billion, three hundred seventy-eight million, one hundred nine thousand, two hundred eighty-seven".