428549875243 has 4 divisors (see below), whose sum is σ = 489771286000. Its totient is φ = 367328464488.

The previous prime is 428549875241. The next prime is 428549875261. The reversal of 428549875243 is 342578945824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 428549875243 - 2¹ = 428549875241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428549875241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30610705368 + ... + 30610705381.

It is an arithmetic number, because the mean of its divisors is an integer number (122442821500).

Almost surely, 2^428549875243 is an apocalyptic number.

428549875243 is a deficient number, since it is larger than the sum of its proper divisors (61221410757).

428549875243 is an equidigital number, since it uses as much as digits as its factorization.

428549875243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61221410756.

The product of its digits is 77414400, while the sum is 61.

The spelling of 428549875243 in words is "four hundred twenty-eight billion, five hundred forty-nine million, eight hundred seventy-five thousand, two hundred forty-three".