28328255278 has 4 divisors (see below), whose sum is σ = 42492382920. Its totient is φ = 14164127638.

The previous prime is 28328255261. The next prime is 28328255287. The reversal of 28328255278 is 87255282382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87255282382 = 2 ⋅43627641191.

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, 7082063818 + ... + 7082063821.

It is an arithmetic number, because the mean of its divisors is an integer number (10623095730).

Almost surely, 2^28328255278 is an apocalyptic number.

28328255278 is a deficient number, since it is larger than the sum of its proper divisors (14164127642).

28328255278 is a wasteful number, since it uses less digits than its factorization.

28328255278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14164127641.

The product of its digits is 4300800, while the sum is 52.

The spelling of 28328255278 in words is "twenty-eight billion, three hundred twenty-eight million, two hundred fifty-five thousand, two hundred seventy-eight".