428506017578 has 8 divisors (see below), whose sum is σ = 642898861572. Its totient is φ = 214206397056.

The previous prime is 428506017571. The next prime is 428506017613. The reversal of 428506017578 is 875710605824.

It can be written as a sum of positive squares in 2 ways, for example, as 405001141609 + 23504875969 = 636397^2 + 153313^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (428506017571) 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, 23294375 + ... + 23312762.

Almost surely, 2^428506017578 is an apocalyptic number.

428506017578 is a deficient number, since it is larger than the sum of its proper divisors (214392843994).

428506017578 is a wasteful number, since it uses less digits than its factorization.

428506017578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46611736.

The product of its (nonzero) digits is 3763200, while the sum is 53.

The spelling of 428506017578 in words is "four hundred twenty-eight billion, five hundred six million, seventeen thousand, five hundred seventy-eight".