28538608628530 has 64 divisors (see below), whose sum is σ = 68971630387968. Its totient is φ = 8210908373760.

The previous prime is 28538608628483. The next prime is 28538608628531. The reversal of 28538608628530 is 3582680683582.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28538608628531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1425494917 + ... + 1425514936.

It is an arithmetic number, because the mean of its divisors is an integer number (1077681724812).

Almost surely, 2^{28538608628530} is an apocalyptic number.

28538608628530 is an abundant number, since it is smaller than the sum of its proper divisors (40433021759438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28538608628530 is a wasteful number, since it uses less digits than its factorization.

28538608628530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2851009891.

The product of its (nonzero) digits is 132710400, while the sum is 64.

The spelling of 28538608628530 in words is "twenty-eight trillion, five hundred thirty-eight billion, six hundred eight million, six hundred twenty-eight thousand, five hundred thirty".