28530608308 has 6 divisors (see below), whose sum is σ = 49928564546. Its totient is φ = 14265304152.

The previous prime is 28530608299. The next prime is 28530608311. The reversal of 28530608308 is 80380603582.

It can be written as a sum of positive squares in only one way, i.e., 21603708324 + 6926899984 = 146982^2 + 83228^2 .

It is a super-2 number, since 2×28530608308² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3566326035 + ... + 3566326042.

Almost surely, 2^28530608308 is an apocalyptic number.

It is an amenable number.

28530608308 is a deficient number, since it is larger than the sum of its proper divisors (21397956238).

28530608308 is a wasteful number, since it uses less digits than its factorization.

28530608308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7132652081 (or 7132652079 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 28530608308 in words is "twenty-eight billion, five hundred thirty million, six hundred eight thousand, three hundred eight".