28626428305 has 8 divisors (see below), whose sum is σ = 34482330432. Its totient is φ = 22814065008.

The previous prime is 28626428297. The next prime is 28626428309. The reversal of 28626428305 is 50382462682.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28626428305 - 2³ = 28626428297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28626428309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10883259 + ... + 10885888.

It is an arithmetic number, because the mean of its divisors is an integer number (4310291304).

Almost surely, 2^28626428305 is an apocalyptic number.

It is an amenable number.

28626428305 is a deficient number, since it is larger than the sum of its proper divisors (5855902127).

28626428305 is a wasteful number, since it uses less digits than its factorization.

28626428305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21769415.

The product of its (nonzero) digits is 1105920, while the sum is 46.

The spelling of 28626428305 in words is "twenty-eight billion, six hundred twenty-six million, four hundred twenty-eight thousand, three hundred five".