28741205281 has 8 divisors (see below), whose sum is σ = 29060102144. Its totient is φ = 28423755360.

The previous prime is 28741205263. The next prime is 28741205291. The reversal of 28741205281 is 18250214782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28741205281 - 2⁷ = 28741205153 is a prime.

It is a super-2 number, since 2×28741205281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28741205221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321765 + ... + 401266.

It is an arithmetic number, because the mean of its divisors is an integer number (3632512768).

Almost surely, 2^28741205281 is an apocalyptic number.

It is an amenable number.

28741205281 is a deficient number, since it is larger than the sum of its proper divisors (318896863).

28741205281 is a wasteful number, since it uses less digits than its factorization.

28741205281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723471.

The product of its (nonzero) digits is 71680, while the sum is 40.

The spelling of 28741205281 in words is "twenty-eight billion, seven hundred forty-one million, two hundred five thousand, two hundred eighty-one".