28165120238 has 16 divisors (see below), whose sum is σ = 42338123520. Its totient is φ = 14052437496.

The previous prime is 28165120237. The next prime is 28165120253. The reversal of 28165120238 is 83202156182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28165120237) 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, 2945381 + ... + 2954927.

It is an arithmetic number, because the mean of its divisors is an integer number (2646132720).

Almost surely, 2^28165120238 is an apocalyptic number.

28165120238 is a deficient number, since it is larger than the sum of its proper divisors (14173003282).

28165120238 is a wasteful number, since it uses less digits than its factorization.

28165120238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12551.

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 28165120238 in words is "twenty-eight billion, one hundred sixty-five million, one hundred twenty thousand, two hundred thirty-eight".