28645424528 has 20 divisors (see below), whose sum is σ = 63429154560. Its totient is φ = 12276610464.

The previous prime is 28645424519. The next prime is 28645424573. The reversal of 28645424528 is 82542454682.

It is a super-4 number, since 4×28645424528⁴ (a number of 43 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127881248 + ... + 127881471.

It is an arithmetic number, because the mean of its divisors is an integer number (3171457728).

Almost surely, 2^28645424528 is an apocalyptic number.

28645424528 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28645424528 is an abundant number, since it is smaller than the sum of its proper divisors (34783730032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28645424528 is a wasteful number, since it uses less digits than its factorization.

28645424528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255762734 (or 255762728 counting only the distinct ones).

The product of its digits is 4915200, while the sum is 50.

The spelling of 28645424528 in words is "twenty-eight billion, six hundred forty-five million, four hundred twenty-four thousand, five hundred twenty-eight".