28285628101 has 4 divisors (see below), whose sum is σ = 28292546304. Its totient is φ = 28278709900.

The previous prime is 28285628099. The next prime is 28285628117. The reversal of 28285628101 is 10182658282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10182658282 = 2 ⋅5091329141.

It is a cyclic number.

It is not a de Polignac number, because 28285628101 - 2¹ = 28285628099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28285628131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3452965 + ... + 3461146.

It is an arithmetic number, because the mean of its divisors is an integer number (7073136576).

Almost surely, 2^28285628101 is an apocalyptic number.

It is an amenable number.

28285628101 is a deficient number, since it is larger than the sum of its proper divisors (6918203).

28285628101 is an equidigital number, since it uses as much as digits as its factorization.

28285628101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6918202.

The product of its (nonzero) digits is 122880, while the sum is 43.

The spelling of 28285628101 in words is "twenty-eight billion, two hundred eighty-five million, six hundred twenty-eight thousand, one hundred one".