28608365278 has 4 divisors (see below), whose sum is σ = 42912547920. Its totient is φ = 14304182638.

The previous prime is 28608365251. The next prime is 28608365299. The reversal of 28608365278 is 87256380682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87256380682 = 2 ⋅43628190341.

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, 7152091318 + ... + 7152091321.

It is an arithmetic number, because the mean of its divisors is an integer number (10728136980).

Almost surely, 2^28608365278 is an apocalyptic number.

28608365278 is a deficient number, since it is larger than the sum of its proper divisors (14304182642).

28608365278 is a wasteful number, since it uses less digits than its factorization.

28608365278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14304182641.

The product of its (nonzero) digits is 7741440, while the sum is 55.

The spelling of 28608365278 in words is "twenty-eight billion, six hundred eight million, three hundred sixty-five thousand, two hundred seventy-eight".