28406930947171 has 32 divisors (see below), whose sum is σ = 33330059840000. Its totient is φ = 23703925432320.

The previous prime is 28406930947159. The next prime is 28406930947177. The reversal of 28406930947171 is 17174903960482.

It is not a de Polignac number, because 28406930947171 - 2³⁹ = 27857175133283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28406930947177) 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, 115380061 + ... + 115626001.

It is an arithmetic number, because the mean of its divisors is an integer number (1041564370000).

Almost surely, 2^{28406930947171} is an apocalyptic number.

28406930947171 is a deficient number, since it is larger than the sum of its proper divisors (4923128892829).

28406930947171 is a wasteful number, since it uses less digits than its factorization.

28406930947171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247259.

The product of its (nonzero) digits is 18289152, while the sum is 61.

The spelling of 28406930947171 in words is "twenty-eight trillion, four hundred six billion, nine hundred thirty million, nine hundred forty-seven thousand, one hundred seventy-one".