438016457 has 4 divisors (see below), whose sum is σ = 438234576. Its totient is φ = 437798340.

The previous prime is 438016429. The next prime is 438016459. The reversal of 438016457 is 754610834.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 754610834 = 2 ⋅377305417.

It is a cyclic number.

It is not a de Polignac number, because 438016457 - 2¹⁰ = 438015433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 438016457.

It is not an unprimeable number, because it can be changed into a prime (438016459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106019 + ... + 110072.

It is an arithmetic number, because the mean of its divisors is an integer number (109558644).

Almost surely, 2^438016457 is an apocalyptic number.

It is an amenable number.

438016457 is a deficient number, since it is larger than the sum of its proper divisors (218119).

438016457 is a wasteful number, since it uses less digits than its factorization.

438016457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218118.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 438016457 is about 20928.8427057016. The cubic root of 438016457 is about 759.4458431472.

The spelling of 438016457 in words is "four hundred thirty-eight million, sixteen thousand, four hundred fifty-seven".