28322724169 has 8 divisors (see below), whose sum is σ = 29485994760. Its totient is φ = 27171895296.

The previous prime is 28322724139. The next prime is 28322724173. The reversal of 28322724169 is 96142722382.

It can be written as a sum of positive squares in 4 ways, for example, as 10363240000 + 17959484169 = 101800^2 + 134013^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28322724169 - 2⁵ = 28322724137 is a prime.

It is a super-2 number, since 2×28322724169² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28322724139) 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, 3105784 + ... + 3114889.

It is an arithmetic number, because the mean of its divisors is an integer number (3685749345).

Almost surely, 2^28322724169 is an apocalyptic number.

28322724169 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28322724169 is a deficient number, since it is larger than the sum of its proper divisors (1163270591).

28322724169 is a wasteful number, since it uses less digits than its factorization.

28322724169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6220859.

The product of its digits is 580608, while the sum is 46.

The spelling of 28322724169 in words is "twenty-eight billion, three hundred twenty-two million, seven hundred twenty-four thousand, one hundred sixty-nine".