28647673920 has 224 divisors, whose sum is σ = 105457386240. Its totient is φ = 7307182080.

The previous prime is 28647673907. The next prime is 28647673921. The reversal of 28647673920 is 2937674682.

28647673920 is a `hidden beast` number, since 2 + 86 + 476 + 7 + 3 + 92 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (28647673921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126640 + ... + 270800.

Almost surely, 2^28647673920 is an apocalyptic number.

28647673920 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 28647673920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52728693120).

28647673920 is an abundant number, since it is smaller than the sum of its proper divisors (76809712320).

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

28647673920 is a wasteful number, since it uses less digits than its factorization.

28647673920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144210 (or 144194 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 54.

The spelling of 28647673920 in words is "twenty-eight billion, six hundred forty-seven million, six hundred seventy-three thousand, nine hundred twenty".