28528906011 has 8 divisors (see below), whose sum is σ = 40040569920. Its totient is φ = 18018256392.

The previous prime is 28528906009. The next prime is 28528906039. The reversal of 28528906011 is 11060982582.

It is a happy number.

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

It is not a de Polignac number, because 28528906011 - 2¹ = 28528906009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28528906051) 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, 250253505 + ... + 250253618.

It is an arithmetic number, because the mean of its divisors is an integer number (5005071240).

Almost surely, 2^28528906011 is an apocalyptic number.

28528906011 is a deficient number, since it is larger than the sum of its proper divisors (11511663909).

28528906011 is a wasteful number, since it uses less digits than its factorization.

28528906011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500507145.

The product of its (nonzero) digits is 69120, while the sum is 42.

The spelling of 28528906011 in words is "twenty-eight billion, five hundred twenty-eight million, nine hundred six thousand, eleven".