428777833 has 16 divisors (see below), whose sum is σ = 485982720. Its totient is φ = 374774400.

The previous prime is 428777831. The next prime is 428777849. The reversal of 428777833 is 338777824.

It is a happy number.

It is not a de Polignac number, because 428777833 - 2¹ = 428777831 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428777831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49533 + ... + 57541.

It is an arithmetic number, because the mean of its divisors is an integer number (30373920).

Almost surely, 2^428777833 is an apocalyptic number.

It is an amenable number.

428777833 is a deficient number, since it is larger than the sum of its proper divisors (57204887).

428777833 is a wasteful number, since it uses less digits than its factorization.

428777833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8208.

The product of its digits is 1580544, while the sum is 49.

The square root of 428777833 is about 20706.9513207522. The cubic root of 428777833 is about 754.0684579964.

Subtracting from 428777833 its reverse (338777824), we obtain a palindrome (90000009).

The spelling of 428777833 in words is "four hundred twenty-eight million, seven hundred seventy-seven thousand, eight hundred thirty-three".