428172353889 has 16 divisors (see below), whose sum is σ = 652473107328. Its totient is φ = 244662417792.

The previous prime is 428172353887. The next prime is 428172354031. The reversal of 428172353889 is 988353271824.

It is not a de Polignac number, because 428172353889 - 2¹ = 428172353887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428172353887) 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, 430099 + ... + 1020455.

It is an arithmetic number, because the mean of its divisors is an integer number (40779569208).

Almost surely, 2^428172353889 is an apocalyptic number.

It is an amenable number.

428172353889 is a deficient number, since it is larger than the sum of its proper divisors (224300753439).

428172353889 is a wasteful number, since it uses less digits than its factorization.

428172353889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624904.

The product of its digits is 23224320, while the sum is 60.

The spelling of 428172353889 in words is "four hundred twenty-eight billion, one hundred seventy-two million, three hundred fifty-three thousand, eight hundred eighty-nine".