28273854840 has 512 divisors, whose sum is σ = 108271779840. Its totient is φ = 5736960000.

The previous prime is 28273854821. The next prime is 28273854871. The reversal of 28273854840 is 4845837282.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 112644715 + ... + 112644965.

It is an arithmetic number, because the mean of its divisors is an integer number (211468320).

Almost surely, 2^28273854840 is an apocalyptic number.

28273854840 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 28273854840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54135889920).

28273854840 is an abundant number, since it is smaller than the sum of its proper divisors (79997925000).

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

28273854840 is a wasteful number, since it uses less digits than its factorization.

28273854840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 519 counting only the distinct ones).

The product of its (nonzero) digits is 3440640, while the sum is 51.

The spelling of 28273854840 in words is "twenty-eight billion, two hundred seventy-three million, eight hundred fifty-four thousand, eight hundred forty".