28841605285 has 8 divisors (see below), whose sum is σ = 34916209560. Its totient is φ = 22869095424.

The previous prime is 28841605223. The next prime is 28841605337. The reversal of 28841605285 is 58250614882.

It can be written as a sum of positive squares in 4 ways, for example, as 2828431489 + 26013173796 = 53183^2 + 161286^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28841605285 - 2⁷ = 28841605157 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25522980 + ... + 25524109.

It is an arithmetic number, because the mean of its divisors is an integer number (4364526195).

Almost surely, 2^28841605285 is an apocalyptic number.

It is an amenable number.

28841605285 is a deficient number, since it is larger than the sum of its proper divisors (6074604275).

28841605285 is a wasteful number, since it uses less digits than its factorization.

28841605285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51047207.

The product of its (nonzero) digits is 1228800, while the sum is 49.

The spelling of 28841605285 in words is "twenty-eight billion, eight hundred forty-one million, six hundred five thousand, two hundred eighty-five".