28974424778 has 16 divisors (see below), whose sum is σ = 46811618280. Its totient is φ = 13370874816.

The previous prime is 28974424763. The next prime is 28974424847. The reversal of 28974424778 is 87742447982.

It can be written as a sum of positive squares in 4 ways, for example, as 20248436209 + 8725988569 = 142297^2 + 93413^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28974424778.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110876 + ... + 265032.

Almost surely, 2^28974424778 is an apocalyptic number.

28974424778 is a deficient number, since it is larger than the sum of its proper divisors (17837193502).

28974424778 is a wasteful number, since it uses less digits than its factorization.

28974424778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161401.

The product of its digits is 50577408, while the sum is 62.

The spelling of 28974424778 in words is "twenty-eight billion, nine hundred seventy-four million, four hundred twenty-four thousand, seven hundred seventy-eight".