438020893 has 4 divisors (see below), whose sum is σ = 438108160. Its totient is φ = 437933628.

The previous prime is 438020881. The next prime is 438020971. The reversal of 438020893 is 398020834.

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: 398020834 = 2 ⋅199010417.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438020893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438020593) 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, 35613 + ... + 46306.

It is an arithmetic number, because the mean of its divisors is an integer number (109527040).

Almost surely, 2^438020893 is an apocalyptic number.

It is an amenable number.

438020893 is a deficient number, since it is larger than the sum of its proper divisors (87267).

438020893 is an equidigital number, since it uses as much as digits as its factorization.

438020893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87266.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 438020893 is about 20928.9486835818. The cubic root of 438020893 is about 759.4484068943.

The spelling of 438020893 in words is "four hundred thirty-eight million, twenty thousand, eight hundred ninety-three".