28094940720 has 720 divisors, whose sum is σ = 122887634688. Its totient is φ = 5795297280.

The previous prime is 28094940631. The next prime is 28094940743. The reversal of 28094940720 is 2704949082.

It is a tau number, because it is divible by the number of its divisors (720).

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 polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 205072492 + ... + 205072628.

Almost surely, 2^28094940720 is an apocalyptic number.

28094940720 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 28094940720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61443817344).

28094940720 is an abundant number, since it is smaller than the sum of its proper divisors (94792693968).

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

28094940720 is a wasteful number, since it uses less digits than its factorization.

28094940720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 28094940720 in words is "twenty-eight billion, ninety-four million, nine hundred forty thousand, seven hundred twenty".