28178901504 has 240 divisors, whose sum is σ = 88451755392. Its totient is φ = 8584372224.

The previous prime is 28178901481. The next prime is 28178901533. The reversal of 28178901504 is 40510987182.

It is a self number, because there is not a number n which added to its sum of digits gives 28178901504.

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, 6167829 + ... + 6172395.

Almost surely, 2^28178901504 is an apocalyptic number.

28178901504 is a gapful number since it is divisible by the number (24) 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 28178901504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44225877696).

28178901504 is an abundant number, since it is smaller than the sum of its proper divisors (60272853888).

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

28178901504 is a wasteful number, since it uses less digits than its factorization.

28178901504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4707 (or 4688 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 28178901504 in words is "twenty-eight billion, one hundred seventy-eight million, nine hundred one thousand, five hundred four".