28025025680 has 20 divisors (see below), whose sum is σ = 65158184892. Its totient is φ = 11210010240.

The previous prime is 28025025629. The next prime is 28025025751. The reversal of 28025025680 is 8652052082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13545235456 + 14479790224 = 116384^2 + 120332^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

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 in 3 ways as a sum of consecutive naturals, for example, 175156331 + ... + 175156490.

Almost surely, 2^28025025680 is an apocalyptic number.

28025025680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28025025680 is an abundant number, since it is smaller than the sum of its proper divisors (37133159212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28025025680 is a wasteful number, since it uses less digits than its factorization.

28025025680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350312834 (or 350312828 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 38.

The spelling of 28025025680 in words is "twenty-eight billion, twenty-five million, twenty-five thousand, six hundred eighty".