428019415915 has 32 divisors (see below), whose sum is σ = 646852985856. Its totient is φ = 264621651840.

The previous prime is 428019415913. The next prime is 428019415919. The reversal of 428019415915 is 519514910824.

It is not a de Polignac number, because 428019415915 - 2¹ = 428019415913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428019415913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10918831 + ... + 10957960.

It is an arithmetic number, because the mean of its divisors is an integer number (20214155808).

Almost surely, 2^428019415915 is an apocalyptic number.

428019415915 is a deficient number, since it is larger than the sum of its proper divisors (218833569941).

428019415915 is a wasteful number, since it uses less digits than its factorization.

428019415915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21876859.

The product of its (nonzero) digits is 518400, while the sum is 49.

The spelling of 428019415915 in words is "four hundred twenty-eight billion, nineteen million, four hundred fifteen thousand, nine hundred fifteen".