428272823 has 32 divisors (see below), whose sum is σ = 507332160. Its totient is φ = 357212160.

The previous prime is 428272769. The next prime is 428272837. The reversal of 428272823 is 328272824.

It is not a de Polignac number, because 428272823 - 2⁸ = 428272567 is a prime.

It is a super-2 number, since 2×428272823² = 366835221840778658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428272853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1870073 + ... + 1870301.

It is an arithmetic number, because the mean of its divisors is an integer number (15854130).

Almost surely, 2^428272823 is an apocalyptic number.

428272823 is a deficient number, since it is larger than the sum of its proper divisors (79059337).

428272823 is a wasteful number, since it uses less digits than its factorization.

428272823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467.

The product of its digits is 86016, while the sum is 38.

The square root of 428272823 is about 20694.7535138740. The cubic root of 428272823 is about 753.7722970741.

Subtracting from 428272823 its reverse (328272824), we obtain a palindrome (99999999).

The spelling of 428272823 in words is "four hundred twenty-eight million, two hundred seventy-two thousand, eight hundred twenty-three".