428525823 has 16 divisors (see below), whose sum is σ = 640158336. Its totient is φ = 252692640.

The previous prime is 428525819. The next prime is 428525827. The reversal of 428525823 is 328525824.

It is an interprime number because it is at equal distance from previous prime (428525819) and next prime (428525827).

It is not a de Polignac number, because 428525823 - 2² = 428525819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428525827) 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 15 ways as a sum of consecutive naturals, for example, 174261 + ... + 176702.

It is an arithmetic number, because the mean of its divisors is an integer number (40009896).

Almost surely, 2^428525823 is an apocalyptic number.

428525823 is a deficient number, since it is larger than the sum of its proper divisors (211632513).

428525823 is a wasteful number, since it uses less digits than its factorization.

428525823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351014.

The product of its digits is 153600, while the sum is 39.

The square root of 428525823 is about 20700.8652717706. The cubic root of 428525823 is about 753.9206969108.

Subtracting from 428525823 its reverse (328525824), we obtain a palindrome (99999999).

The spelling of 428525823 in words is "four hundred twenty-eight million, five hundred twenty-five thousand, eight hundred twenty-three".