28555009441 has 32 divisors (see below), whose sum is σ = 33703915520. Its totient is φ = 23685105024.

The previous prime is 28555009433. The next prime is 28555009451. The reversal of 28555009441 is 14490055582.

It is not a de Polignac number, because 28555009441 - 2³ = 28555009433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28555009451) 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, 20066056 + ... + 20067478.

It is an arithmetic number, because the mean of its divisors is an integer number (1053247360).

Almost surely, 2^28555009441 is an apocalyptic number.

It is an amenable number.

28555009441 is a deficient number, since it is larger than the sum of its proper divisors (5148906079).

28555009441 is a wasteful number, since it uses less digits than its factorization.

28555009441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045.

The product of its (nonzero) digits is 288000, while the sum is 43.

The spelling of 28555009441 in words is "twenty-eight billion, five hundred fifty-five million, nine thousand, four hundred forty-one".