28078055025 has 12 divisors (see below), whose sum is σ = 46422384432. Its totient is φ = 14974962640.

The previous prime is 28078055009. The next prime is 28078055029. The reversal of 28078055025 is 52055087082.

It is not a de Polignac number, because 28078055025 - 2⁴ = 28078055009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28078055029) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 187186959 + ... + 187187108.

It is an arithmetic number, because the mean of its divisors is an integer number (3868532036).

Almost surely, 2^28078055025 is an apocalyptic number.

28078055025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28078055025 is a deficient number, since it is larger than the sum of its proper divisors (18344329407).

28078055025 is a wasteful number, since it uses less digits than its factorization.

28078055025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374374080 (or 374374075 counting only the distinct ones).

The product of its (nonzero) digits is 224000, while the sum is 42.

The spelling of 28078055025 in words is "twenty-eight billion, seventy-eight million, fifty-five thousand, twenty-five".