28225384920 has 96 divisors (see below), whose sum is σ = 97128551520. Its totient is φ = 7084016640.

The previous prime is 28225384909. The next prime is 28225384931. The reversal of 28225384920 is 2948352282.

28225384920 is a `hidden beast` number, since 2 + 8 + 22 + 538 + 4 + 92 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (28225384909) and next prime (28225384931).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 2299876 + ... + 2312115.

It is an arithmetic number, because the mean of its divisors is an integer number (1011755745).

Almost surely, 2^28225384920 is an apocalyptic number.

28225384920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28225384920 is an abundant number, since it is smaller than the sum of its proper divisors (68903166600).

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

28225384920 is a wasteful number, since it uses less digits than its factorization.

28225384920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4612025 (or 4612018 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 28225384920 in words is "twenty-eight billion, two hundred twenty-five million, three hundred eighty-four thousand, nine hundred twenty".