428333823 has 6 divisors (see below), whose sum is σ = 618704424. Its totient is φ = 285555876.

The previous prime is 428333821. The next prime is 428333833. The reversal of 428333823 is 328333824.

It is a happy number.

It is not a de Polignac number, because 428333823 - 2¹ = 428333821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428333821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23796315 + ... + 23796332.

It is an arithmetic number, because the mean of its divisors is an integer number (103117404).

Almost surely, 2^428333823 is an apocalyptic number.

428333823 is a deficient number, since it is larger than the sum of its proper divisors (190370601).

428333823 is a wasteful number, since it uses less digits than its factorization.

428333823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47592653 (or 47592650 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 428333823 is about 20696.2272648906. The cubic root of 428333823 is about 753.8080826177.

Subtracting from 428333823 its reverse (328333824), we obtain a palindrome (99999999).

It can be divided in two parts, 42833 and 3823, that added together give a 6-th power (46656 = 6⁶).

The spelling of 428333823 in words is "four hundred twenty-eight million, three hundred thirty-three thousand, eight hundred twenty-three".