438120865 has 16 divisors (see below), whose sum is σ = 647071488. Its totient is φ = 277315776.

The previous prime is 438120847. The next prime is 438120901. The reversal of 438120865 is 568021834.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 438120865 - 2⁵ = 438120833 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480997 + ... + 481906.

It is an arithmetic number, because the mean of its divisors is an integer number (40441968).

Almost surely, 2^438120865 is an apocalyptic number.

It is an amenable number.

438120865 is a deficient number, since it is larger than the sum of its proper divisors (208950623).

438120865 is a wasteful number, since it uses less digits than its factorization.

438120865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962928.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 438120865 is about 20931.3369138237. The cubic root of 438120865 is about 759.5061802425.

The spelling of 438120865 in words is "four hundred thirty-eight million, one hundred twenty thousand, eight hundred sixty-five".