28543674240 has 256 divisors, whose sum is σ = 102345249600. Its totient is φ = 7611273216.

The previous prime is 28543674221. The next prime is 28543674281. The reversal of 28543674240 is 4247634582.

It is a happy number.

28543674240 is a `hidden beast` number, since 2 + 8 + 543 + 67 + 4 + 2 + 40 = 666.

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 31 ways as a sum of consecutive naturals, for example, 1389484 + ... + 1409876.

Almost surely, 2^28543674240 is an apocalyptic number.

28543674240 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 28543674240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51172624800).

28543674240 is an abundant number, since it is smaller than the sum of its proper divisors (73801575360).

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

28543674240 is an frugal number, since it uses more digits than its factorization.

28543674240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20433 (or 20403 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 45.

The spelling of 28543674240 in words is "twenty-eight billion, five hundred forty-three million, six hundred seventy-four thousand, two hundred forty".