28606638207875 has 64 divisors (see below), whose sum is σ = 43942276175616. Its totient is φ = 18106036992000.

The previous prime is 28606638207839. The next prime is 28606638207877. The reversal of 28606638207875 is 57870283660682.

It is a happy number.

It is not a de Polignac number, because 28606638207875 - 2⁶ = 28606638207811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28606638207877) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 236004785 + ... + 236125965.

It is an arithmetic number, because the mean of its divisors is an integer number (686598065244).

Almost surely, 2^{28606638207875} is an apocalyptic number.

28606638207875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28606638207875 is a deficient number, since it is larger than the sum of its proper divisors (15335637967741).

28606638207875 is a wasteful number, since it uses less digits than its factorization.

28606638207875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141969 (or 141959 counting only the distinct ones).

The product of its (nonzero) digits is 325140480, while the sum is 68.

The spelling of 28606638207875 in words is "twenty-eight trillion, six hundred six billion, six hundred thirty-eight million, two hundred seven thousand, eight hundred seventy-five".