28078734047 has 8 divisors (see below), whose sum is σ = 34558442016. Its totient is φ = 22216141152.

The previous prime is 28078734023. The next prime is 28078734053. The reversal of 28078734047 is 74043787082.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28078734047 - 2¹² = 28078729951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28078733986 and 28078734004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28078734007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154278668 + ... + 154278849.

It is an arithmetic number, because the mean of its divisors is an integer number (4319805252).

Almost surely, 2^28078734047 is an apocalyptic number.

28078734047 is a deficient number, since it is larger than the sum of its proper divisors (6479707969).

28078734047 is a wasteful number, since it uses less digits than its factorization.

28078734047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308557537.

The product of its (nonzero) digits is 2107392, while the sum is 50.

The spelling of 28078734047 in words is "twenty-eight billion, seventy-eight million, seven hundred thirty-four thousand, forty-seven".