28555441440 has 48 divisors (see below), whose sum is σ = 89949642048. Its totient is φ = 7614784256.

The previous prime is 28555441427. The next prime is 28555441441. The reversal of 28555441440 is 4414455582.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 28555441392 and 28555441401.

It is not an unprimeable number, because it can be changed into a prime (28555441441) 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, 29744772 + ... + 29745731.

It is an arithmetic number, because the mean of its divisors is an integer number (1873950876).

Almost surely, 2^28555441440 is an apocalyptic number.

28555441440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28555441440 is an abundant number, since it is smaller than the sum of its proper divisors (61394200608).

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

28555441440 is a wasteful number, since it uses less digits than its factorization.

28555441440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59490521 (or 59490513 counting only the distinct ones).

The product of its (nonzero) digits is 512000, while the sum is 42.

The spelling of 28555441440 in words is "twenty-eight billion, five hundred fifty-five million, four hundred forty-one thousand, four hundred forty".