28996049280 has 256 divisors, whose sum is σ = 101003500800. Its totient is φ = 7017062400.

The previous prime is 28996049273. The next prime is 28996049281. The reversal of 28996049280 is 8294069982.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28996049280.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28996049281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19873191 + ... + 19874649.

It is an arithmetic number, because the mean of its divisors is an integer number (394544925).

Almost surely, 2^28996049280 is an apocalyptic number.

28996049280 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 28996049280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50501750400).

28996049280 is an abundant number, since it is smaller than the sum of its proper divisors (72007451520).

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

28996049280 is a wasteful number, since it uses less digits than its factorization.

28996049280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433 (or 2421 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 57.

The spelling of 28996049280 in words is "twenty-eight billion, nine hundred ninety-six million, forty-nine thousand, two hundred eighty".