28290138293 has 16 divisors (see below), whose sum is σ = 30923356800. Its totient is φ = 25789259520.

The previous prime is 28290138287. The next prime is 28290138307. The reversal of 28290138293 is 39283109282.

It is a cyclic number.

It is not a de Polignac number, because 28290138293 - 2¹⁸ = 28289876149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28290168293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191873 + ... + 305606.

It is an arithmetic number, because the mean of its divisors is an integer number (1932709800).

Almost surely, 2^28290138293 is an apocalyptic number.

It is an amenable number.

28290138293 is a deficient number, since it is larger than the sum of its proper divisors (2633218507).

28290138293 is a wasteful number, since it uses less digits than its factorization.

28290138293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497612.

The product of its (nonzero) digits is 373248, while the sum is 47.

The spelling of 28290138293 in words is "twenty-eight billion, two hundred ninety million, one hundred thirty-eight thousand, two hundred ninety-three".