28043230320 has 560 divisors, whose sum is σ = 113371975872. Its totient is φ = 6315356160.

The previous prime is 28043230301. The next prime is 28043230339. The reversal of 28043230320 is 2303234082.

28043230320 is a `hidden beast` number, since 280 + 4 + 32 + 30 + 320 = 666.

It is an interprime number because it is at equal distance from previous prime (28043230301) and next prime (28043230339).

It is a tau number, because it is divible by the number of its divisors (560).

It is a super-3 number, since 3×28043230320³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 29801050 + ... + 29801990.

Almost surely, 2^28043230320 is an apocalyptic number.

28043230320 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 28043230320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56685987936).

28043230320 is an abundant number, since it is smaller than the sum of its proper divisors (85328745552).

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

28043230320 is an equidigital number, since it uses as much as digits as its factorization.

28043230320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052 (or 1031 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The spelling of 28043230320 in words is "twenty-eight billion, forty-three million, two hundred thirty thousand, three hundred twenty".