28785628601 has 4 divisors (see below), whose sum is σ = 29398088832. Its totient is φ = 28173168372.

The previous prime is 28785628583. The next prime is 28785628603. The reversal of 28785628601 is 10682658782.

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.

It is a cyclic number.

It is not a de Polignac number, because 28785628601 - 2⁶ = 28785628537 is a prime.

It is a super-2 number, since 2×28785628601² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28785628603) 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, 306230045 + ... + 306230138.

It is an arithmetic number, because the mean of its divisors is an integer number (7349522208).

Almost surely, 2^28785628601 is an apocalyptic number.

It is an amenable number.

28785628601 is a deficient number, since it is larger than the sum of its proper divisors (612460231).

28785628601 is an equidigital number, since it uses as much as digits as its factorization.

28785628601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612460230.

The product of its (nonzero) digits is 2580480, while the sum is 53.

The spelling of 28785628601 in words is "twenty-eight billion, seven hundred eighty-five million, six hundred twenty-eight thousand, six hundred one".