28099215360 has 320 divisors, whose sum is σ = 100159884000. Its totient is φ = 7474249728.

The previous prime is 28099215359. The next prime is 28099215371. The reversal of 28099215360 is 6351299082.

28099215360 is a `hidden beast` number, since 2 + 8 + 0 + 99 + 21 + 536 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (320).

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 15 ways as a sum of consecutive naturals, for example, 70778682 + ... + 70779078.

Almost surely, 2^28099215360 is an apocalyptic number.

28099215360 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 28099215360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50079942000).

28099215360 is an abundant number, since it is smaller than the sum of its proper divisors (72060668640).

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

28099215360 is an frugal number, since it uses more digits than its factorization.

28099215360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 28099215360 in words is "twenty-eight billion, ninety-nine million, two hundred fifteen thousand, three hundred sixty".