28623203280 has 480 divisors, whose sum is σ = 120638778624. Its totient is φ = 6157099008.

The previous prime is 28623203243. The next prime is 28623203281. The reversal of 28623203280 is 8230232682.

28623203280 is a `hidden beast` number, since 2 + 8 + 6 + 2 + 320 + 328 + 0 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28623203281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2307174 + ... + 2319546.

Almost surely, 2^28623203280 is an apocalyptic number.

28623203280 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 28623203280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60319389312).

28623203280 is an abundant number, since it is smaller than the sum of its proper divisors (92015575344).

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

28623203280 is a wasteful number, since it uses less digits than its factorization.

28623203280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12425 (or 12407 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The spelling of 28623203280 in words is "twenty-eight billion, six hundred twenty-three million, two hundred three thousand, two hundred eighty".