28378052558 has 16 divisors (see below), whose sum is σ = 43211207760. Its totient is φ = 13974866496.

The previous prime is 28378052557. The next prime is 28378052567. The reversal of 28378052558 is 85525087382.

It is a super-2 number, since 2×28378052558² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28378052557) 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, 33560 + ... + 240587.

It is an arithmetic number, because the mean of its divisors is an integer number (2700700485).

Almost surely, 2^28378052558 is an apocalyptic number.

28378052558 is a deficient number, since it is larger than the sum of its proper divisors (14833155202).

28378052558 is a wasteful number, since it uses less digits than its factorization.

28378052558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274931.

The product of its (nonzero) digits is 5376000, while the sum is 53.

The spelling of 28378052558 in words is "twenty-eight billion, three hundred seventy-eight million, fifty-two thousand, five hundred fifty-eight".