428355520087 has 16 divisors (see below), whose sum is σ = 508853289600. Its totient is φ = 356197292640.

The previous prime is 428355520079. The next prime is 428355520111. The reversal of 428355520087 is 780025553824.

It is a cyclic number.

It is not a de Polignac number, because 428355520087 - 2³ = 428355520079 is a prime.

It is a super-3 number, since 3×428355520087³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 428355520087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428355520007) 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, 35330973 + ... + 35343094.

It is an arithmetic number, because the mean of its divisors is an integer number (31803330600).

Almost surely, 2^428355520087 is an apocalyptic number.

428355520087 is a deficient number, since it is larger than the sum of its proper divisors (80497769513).

428355520087 is a wasteful number, since it uses less digits than its factorization.

428355520087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70674126.

The product of its (nonzero) digits is 2688000, while the sum is 49.

The spelling of 428355520087 in words is "four hundred twenty-eight billion, three hundred fifty-five million, five hundred twenty thousand, eighty-seven".