428223523 has 48 divisors (see below), whose sum is σ = 569203200. Its totient is φ = 314316288.

The previous prime is 428223511. The next prime is 428223547. The reversal of 428223523 is 325322824.

It is a happy number.

It is not a de Polignac number, because 428223523 - 2¹⁷ = 428092451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428223563) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2151778 + ... + 2151976.

It is an arithmetic number, because the mean of its divisors is an integer number (11858400).

Almost surely, 2^428223523 is an apocalyptic number.

428223523 is a deficient number, since it is larger than the sum of its proper divisors (140979677).

428223523 is a wasteful number, since it uses less digits than its factorization.

428223523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 343 counting only the distinct ones).

The product of its digits is 23040, while the sum is 31.

The square root of 428223523 is about 20693.5623564431. The cubic root of 428223523 is about 753.7433728322.

The spelling of 428223523 in words is "four hundred twenty-eight million, two hundred twenty-three thousand, five hundred twenty-three".