28061245172 has 6 divisors (see below), whose sum is σ = 49107179058. Its totient is φ = 14030622584.

The previous prime is 28061245099. The next prime is 28061245181. The reversal of 28061245172 is 27154216082.

It can be written as a sum of positive squares in only one way, i.e., 23469014416 + 4592230756 = 153196^2 + 67766^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3507655643 + ... + 3507655650.

It is an arithmetic number, because the mean of its divisors is an integer number (8184529843).

Almost surely, 2^28061245172 is an apocalyptic number.

It is an amenable number.

28061245172 is a deficient number, since it is larger than the sum of its proper divisors (21045933886).

28061245172 is a wasteful number, since it uses less digits than its factorization.

28061245172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7015311297 (or 7015311295 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The spelling of 28061245172 in words is "twenty-eight billion, sixty-one million, two hundred forty-five thousand, one hundred seventy-two".