28348089705 has 24 divisors (see below), whose sum is σ = 52916435208. Its totient is φ = 13955982336.

The previous prime is 28348089691. The next prime is 28348089709. The reversal of 28348089705 is 50798084382.

It is a happy number.

28348089705 is a `hidden beast` number, since 2 + 83 + 480 + 89 + 7 + 0 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 718668864 + 27629420841 = 26808^2 + 166221^2 .

It is not a de Polignac number, because 28348089705 - 2⁵ = 28348089673 is a prime.

It is a super-2 number, since 2×28348089705² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28348089709) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24228552 + ... + 24229721.

It is an arithmetic number, because the mean of its divisors is an integer number (2204851467).

Almost surely, 2^28348089705 is an apocalyptic number.

It is an amenable number.

28348089705 is a deficient number, since it is larger than the sum of its proper divisors (24568345503).

28348089705 is a wasteful number, since it uses less digits than its factorization.

28348089705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48458297 (or 48458294 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 28348089705 in words is "twenty-eight billion, three hundred forty-eight million, eighty-nine thousand, seven hundred five".