28623203278 has 16 divisors (see below), whose sum is σ = 44510034816. Its totient is φ = 13790488320.

The previous prime is 28623203243. The next prime is 28623203281. The reversal of 28623203278 is 87230232682.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 976251 + ... + 1005142.

It is an arithmetic number, because the mean of its divisors is an integer number (2781877176).

Almost surely, 2^28623203278 is an apocalyptic number.

28623203278 is a deficient number, since it is larger than the sum of its proper divisors (15886831538).

28623203278 is a wasteful number, since it uses less digits than its factorization.

28623203278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981659.

The product of its (nonzero) digits is 387072, while the sum is 43.

The spelling of 28623203278 in words is "twenty-eight billion, six hundred twenty-three million, two hundred three thousand, two hundred seventy-eight".