27728426825 has 48 divisors (see below), whose sum is σ = 39181885056. Its totient is φ = 19268620800.

The previous prime is 27728426819. The next prime is 27728426837. The reversal of 27728426825 is 52862482772.

It is a happy number.

It is not a de Polignac number, because 27728426825 - 2¹⁰ = 27728425801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8075309 + ... + 8078741.

It is an arithmetic number, because the mean of its divisors is an integer number (816289272).

Almost surely, 2^27728426825 is an apocalyptic number.

27728426825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27728426825 is a deficient number, since it is larger than the sum of its proper divisors (11453458231).

27728426825 is a wasteful number, since it uses less digits than its factorization.

27728426825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4754 (or 4749 counting only the distinct ones).

The product of its digits is 6021120, while the sum is 53.

The spelling of 27728426825 in words is "twenty-seven billion, seven hundred twenty-eight million, four hundred twenty-six thousand, eight hundred twenty-five".