428758239 has 24 divisors (see below), whose sum is σ = 707475072. Its totient is φ = 226156320.

The previous prime is 428758229. The next prime is 428758271. The reversal of 428758239 is 932857824.

It is not a de Polignac number, because 428758239 - 2¹² = 428754143 is a prime.

It is a super-2 number, since 2×428758239² = 367667255020762242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428758229) 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 23 ways as a sum of consecutive naturals, for example, 56857 + ... + 63954.

It is an arithmetic number, because the mean of its divisors is an integer number (29478128).

Almost surely, 2^428758239 is an apocalyptic number.

428758239 is a deficient number, since it is larger than the sum of its proper divisors (278716833).

428758239 is a wasteful number, since it uses less digits than its factorization.

428758239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120847 (or 120834 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 428758239 is about 20706.4781892045. The cubic root of 428758239 is about 754.0569715176.

It can be divided in two parts, 4287 and 58239, that added together give a palindrome (62526).

The spelling of 428758239 in words is "four hundred twenty-eight million, seven hundred fifty-eight thousand, two hundred thirty-nine".