28885548021 has 8 divisors (see below), whose sum is σ = 42015342624. Its totient is φ = 17506392720.

The previous prime is 28885548017. The next prime is 28885548091. The reversal of 28885548021 is 12084558882.

It is a happy number.

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

It is not a de Polignac number, because 28885548021 - 2² = 28885548017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28885548091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 437659786 + ... + 437659851.

It is an arithmetic number, because the mean of its divisors is an integer number (5251917828).

Almost surely, 2^28885548021 is an apocalyptic number.

It is an amenable number.

28885548021 is a deficient number, since it is larger than the sum of its proper divisors (13129794603).

28885548021 is a wasteful number, since it uses less digits than its factorization.

28885548021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875319651.

The product of its (nonzero) digits is 1638400, while the sum is 51.

The spelling of 28885548021 in words is "twenty-eight billion, eight hundred eighty-five million, five hundred forty-eight thousand, twenty-one".