28276178476225 has 27 divisors (see below), whose sum is σ = 35143454093353. Its totient is φ = 22568809667840.

The previous prime is 28276178476099. The next prime is 28276178476243. The reversal of 28276178476225 is 52267487167282.

The square root of 28276178476225 is 5317535.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 719852130481 + 27556326345744 = 848441^2 + 5249412^2 .

It is not a de Polignac number, because 28276178476225 - 2³⁵ = 28241818737857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 14968860081 + ... + 14968861969.

Almost surely, 2^{28276178476225} is an apocalyptic number.

28276178476225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28276178476225 is the 5317535-th square number.

28276178476225 is the 2658768-th centered octagonal number.

It is an amenable number.

28276178476225 is a deficient number, since it is larger than the sum of its proper divisors (6867275617128).

28276178476225 is an frugal number, since it uses more digits than its factorization.

28276178476225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4914 (or 2457 counting only the distinct ones).

The product of its digits is 252887040, while the sum is 67.

The spelling of 28276178476225 in words is "twenty-eight trillion, two hundred seventy-six billion, one hundred seventy-eight million, four hundred seventy-six thousand, two hundred twenty-five".