28255301997 has 32 divisors (see below), whose sum is σ = 40894081536. Its totient is φ = 17250278400.

The previous prime is 28255301989. The next prime is 28255301999. The reversal of 28255301997 is 79910355282.

It is not a de Polignac number, because 28255301997 - 2³ = 28255301989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28255301999) 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 31 ways as a sum of consecutive naturals, for example, 2541583 + ... + 2552675.

It is an arithmetic number, because the mean of its divisors is an integer number (1277940048).

Almost surely, 2^28255301997 is an apocalyptic number.

It is an amenable number.

28255301997 is a deficient number, since it is larger than the sum of its proper divisors (12638779539).

28255301997 is a wasteful number, since it uses less digits than its factorization.

28255301997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11621.

The product of its (nonzero) digits is 1360800, while the sum is 51.

The spelling of 28255301997 in words is "twenty-eight billion, two hundred fifty-five million, three hundred one thousand, nine hundred ninety-seven".