438428073 has 4 divisors (see below), whose sum is σ = 584570768. Its totient is φ = 292285380.

The previous prime is 438428063. The next prime is 438428077. The reversal of 438428073 is 370824834.

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.

It is not a de Polignac number, because 438428073 - 2¹² = 438423977 is a prime.

It is a super-3 number, since 3×438428073³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438428077) 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, 73071343 + ... + 73071348.

It is an arithmetic number, because the mean of its divisors is an integer number (146142692).

Almost surely, 2^438428073 is an apocalyptic number.

It is an amenable number.

438428073 is a deficient number, since it is larger than the sum of its proper divisors (146142695).

438428073 is a wasteful number, since it uses less digits than its factorization.

438428073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146142694.

The product of its (nonzero) digits is 129024, while the sum is 39.

The square root of 438428073 is about 20938.6740984237. The cubic root of 438428073 is about 759.6836593195.

It can be divided in two parts, 43842 and 8073, that added together give a palindrome (51915).

The spelling of 438428073 in words is "four hundred thirty-eight million, four hundred twenty-eight thousand, seventy-three".