28206484420 has 24 divisors (see below), whose sum is σ = 59237703000. Its totient is φ = 11281815552.

The previous prime is 28206484417. The next prime is 28206484433. The reversal of 28206484420 is 2448460282.

It can be written as a sum of positive squares in 4 ways, for example, as 14072127876 + 14134356544 = 118626^2 + 118888^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 314806 + ... + 394354.

It is an arithmetic number, because the mean of its divisors is an integer number (2468237625).

Almost surely, 2^28206484420 is an apocalyptic number.

28206484420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28206484420 is an abundant number, since it is smaller than the sum of its proper divisors (31031218580).

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

28206484420 is a wasteful number, since it uses less digits than its factorization.

28206484420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97287 (or 97285 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 40.

The spelling of 28206484420 in words is "twenty-eight billion, two hundred six million, four hundred eighty-four thousand, four hundred twenty".