28547672578 has 8 divisors (see below), whose sum is σ = 42898389372. Its totient is φ = 14248209456.

The previous prime is 28547672561. The next prime is 28547672597. The reversal of 28547672578 is 87527674582.

It can be written as a sum of positive squares in 2 ways, for example, as 23005912329 + 5541760249 = 151677^2 + 74443^2 .

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

It is a super-3 number, since 3×28547672578³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12812025 + ... + 12814252.

Almost surely, 2^28547672578 is an apocalyptic number.

28547672578 is a deficient number, since it is larger than the sum of its proper divisors (14350716794).

28547672578 is a wasteful number, since it uses less digits than its factorization.

28547672578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25626836.

The product of its digits is 52684800, while the sum is 61.

The spelling of 28547672578 in words is "twenty-eight billion, five hundred forty-seven million, six hundred seventy-two thousand, five hundred seventy-eight".