28130138645 has 32 divisors (see below), whose sum is σ = 39160288512. Its totient is φ = 18999055872.

The previous prime is 28130138627. The next prime is 28130138669. The reversal of 28130138645 is 54683103182.

It is a cyclic number.

It is not a de Polignac number, because 28130138645 - 2¹⁴ = 28130122261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1967894 + ... + 1982136.

It is an arithmetic number, because the mean of its divisors is an integer number (1223759016).

Almost surely, 2^28130138645 is an apocalyptic number.

It is an amenable number.

28130138645 is a deficient number, since it is larger than the sum of its proper divisors (11030149867).

28130138645 is a wasteful number, since it uses less digits than its factorization.

28130138645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15101.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 28130138645 in words is "twenty-eight billion, one hundred thirty million, one hundred thirty-eight thousand, six hundred forty-five".