28003052778 has 16 divisors (see below), whose sum is σ = 56011512960. Its totient is φ = 9333449696.

The previous prime is 28003052771. The next prime is 28003052821. The reversal of 28003052778 is 87725030082.

It is not an unprimeable number, because it can be changed into a prime (28003052771) by changing a digit.

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, 156363 + ... + 283646.

It is an arithmetic number, because the mean of its divisors is an integer number (3500719560).

Almost surely, 2^28003052778 is an apocalyptic number.

28003052778 is an abundant number, since it is smaller than the sum of its proper divisors (28008460182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28003052778 is a wasteful number, since it uses less digits than its factorization.

28003052778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450621.

The product of its (nonzero) digits is 188160, while the sum is 42.

The spelling of 28003052778 in words is "twenty-eight billion, three million, fifty-two thousand, seven hundred seventy-eight".