428564517983 has 32 divisors (see below), whose sum is σ = 511926428160. Its totient is φ = 351006364800.

The previous prime is 428564517947. The next prime is 428564518003. The reversal of 428564517983 is 389715465824.

It is not a de Polignac number, because 428564517983 - 2²⁰ = 428563469407 is a prime.

It is a super-2 number, since 2×428564517983² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428564517923) 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, 22819385 + ... + 22838157.

It is an arithmetic number, because the mean of its divisors is an integer number (15997700880).

Almost surely, 2^428564517983 is an apocalyptic number.

428564517983 is a deficient number, since it is larger than the sum of its proper divisors (83361910177).

428564517983 is a wasteful number, since it uses less digits than its factorization.

428564517983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19967.

The product of its digits is 58060800, while the sum is 62.

The spelling of 428564517983 in words is "four hundred twenty-eight billion, five hundred sixty-four million, five hundred seventeen thousand, nine hundred eighty-three".