28927364081 has 24 divisors (see below), whose sum is σ = 36921619584. Its totient is φ = 22410437280.

The previous prime is 28927364051. The next prime is 28927364159. The reversal of 28927364081 is 18046372982.

It is not a de Polignac number, because 28927364081 - 2¹⁴ = 28927347697 is a prime.

It is a super-2 number, since 2×28927364081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28927364051) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 61865 + ... + 248358.

It is an arithmetic number, because the mean of its divisors is an integer number (1538400816).

Almost surely, 2^28927364081 is an apocalyptic number.

It is an amenable number.

28927364081 is a deficient number, since it is larger than the sum of its proper divisors (7994255503).

28927364081 is a wasteful number, since it uses less digits than its factorization.

28927364081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310421 (or 310414 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 28927364081 in words is "twenty-eight billion, nine hundred twenty-seven million, three hundred sixty-four thousand, eighty-one".