28055004994 has 4 divisors (see below), whose sum is σ = 42082507494. Its totient is φ = 14027502496.

The previous prime is 28055004983. The next prime is 28055005037. The reversal of 28055004994 is 49940055082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 22369090969 + 5685914025 = 149563^2 + 75405^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7013751247 + ... + 7013751250.

Almost surely, 2^28055004994 is an apocalyptic number.

28055004994 is a deficient number, since it is larger than the sum of its proper divisors (14027502500).

28055004994 is a wasteful number, since it uses less digits than its factorization.

28055004994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14027502499.

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 28055004994 in words is "twenty-eight billion, fifty-five million, four thousand, nine hundred ninety-four".