28289293945 has 8 divisors (see below), whose sum is σ = 37033257600. Its totient is φ = 20574031920.

The previous prime is 28289293943. The next prime is 28289293987. The reversal of 28289293945 is 54939298282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28289293945 - 2¹ = 28289293943 is a prime.

It is a super-2 number, since 2×28289293945² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28289293943) 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 7 ways as a sum of consecutive naturals, for example, 257175345 + ... + 257175454.

It is an arithmetic number, because the mean of its divisors is an integer number (4629157200).

Almost surely, 2^28289293945 is an apocalyptic number.

It is an amenable number.

28289293945 is a deficient number, since it is larger than the sum of its proper divisors (8743963655).

28289293945 is a wasteful number, since it uses less digits than its factorization.

28289293945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514350815.

The product of its digits is 22394880, while the sum is 61.

The spelling of 28289293945 in words is "twenty-eight billion, two hundred eighty-nine million, two hundred ninety-three thousand, nine hundred forty-five".