438485923 has 4 divisors (see below), whose sum is σ = 438631960. Its totient is φ = 438339888.

The previous prime is 438485903. The next prime is 438485941. The reversal of 438485923 is 329584834.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 329584834 = 2 ⋅164792417.

It is a cyclic number.

It is not a de Polignac number, because 438485923 - 2¹³ = 438477731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438485903) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 68418 + ... + 74551.

It is an arithmetic number, because the mean of its divisors is an integer number (109657990).

Almost surely, 2^438485923 is an apocalyptic number.

438485923 is a deficient number, since it is larger than the sum of its proper divisors (146037).

438485923 is a wasteful number, since it uses less digits than its factorization.

438485923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146036.

The product of its digits is 829440, while the sum is 46.

The square root of 438485923 is about 20940.0554679304. The cubic root of 438485923 is about 759.7170709322.

The spelling of 438485923 in words is "four hundred thirty-eight million, four hundred eighty-five thousand, nine hundred twenty-three".