28108136454 has 16 divisors (see below), whose sum is σ = 56234544192. Its totient is φ = 9366333608.

The previous prime is 28108136453. The next prime is 28108136467. The reversal of 28108136454 is 45463180182.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28108136453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 741264 + ... + 778259.

It is an arithmetic number, because the mean of its divisors is an integer number (3514659012).

Almost surely, 2^28108136454 is an apocalyptic number.

28108136454 is an abundant number, since it is smaller than the sum of its proper divisors (28126407738).

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

28108136454 is a wasteful number, since it uses less digits than its factorization.

28108136454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522611.

The product of its (nonzero) digits is 184320, while the sum is 42.

The spelling of 28108136454 in words is "twenty-eight billion, one hundred eight million, one hundred thirty-six thousand, four hundred fifty-four".