28555223040 has 336 divisors, whose sum is σ = 100471565376. Its totient is φ = 7500595200.

The previous prime is 28555223033. The next prime is 28555223041. The reversal of 28555223040 is 4032255582.

It is a happy number.

28555223040 is a `hidden beast` number, since 2 + 85 + 552 + 23 + 0 + 4 + 0 = 666.

It is a super-5 number, since 5×28555223040⁵ (a number of 53 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28555222986 and 28555223004.

It is not an unprimeable number, because it can be changed into a prime (28555223041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26172895 + ... + 26173985.

It is an arithmetic number, because the mean of its divisors is an integer number (299022516).

Almost surely, 2^28555223040 is an apocalyptic number.

28555223040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28555223040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50235782688).

28555223040 is an abundant number, since it is smaller than the sum of its proper divisors (71916342336).

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

28555223040 is a wasteful number, since it uses less digits than its factorization.

28555223040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199 (or 1172 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The spelling of 28555223040 in words is "twenty-eight billion, five hundred fifty-five million, two hundred twenty-three thousand, forty".