28941857280 has 800 divisors, whose sum is σ = 120162594816. Its totient is φ = 6521389056.

The previous prime is 28941857251. The next prime is 28941857299. The reversal of 28941857280 is 8275814982.

28941857280 is a `hidden beast` number, since 2 + 89 + 418 + 5 + 72 + 80 = 666.

It is a super-2 number, since 2×28941857280² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 184342962 + ... + 184343118.

Almost surely, 2^28941857280 is an apocalyptic number.

28941857280 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 28941857280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60081297408).

28941857280 is an abundant number, since it is smaller than the sum of its proper divisors (91220737536).

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

28941857280 is a wasteful number, since it uses less digits than its factorization.

28941857280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 28941857280 in words is "twenty-eight billion, nine hundred forty-one million, eight hundred fifty-seven thousand, two hundred eighty".