28400542786 has 48 divisors (see below), whose sum is σ = 54172258272. Its totient is φ = 11042404800.

The previous prime is 28400542783. The next prime is 28400542799. The reversal of 28400542786 is 68724500482.

It is a super-3 number, since 3×28400542786³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (28400542783) 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 23 ways as a sum of consecutive naturals, for example, 502470 + ... + 556126.

It is an arithmetic number, because the mean of its divisors is an integer number (1128588714).

Almost surely, 2^28400542786 is an apocalyptic number.

28400542786 is a deficient number, since it is larger than the sum of its proper divisors (25771715486).

28400542786 is a wasteful number, since it uses less digits than its factorization.

28400542786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54175 (or 54168 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 46.

The spelling of 28400542786 in words is "twenty-eight billion, four hundred million, five hundred forty-two thousand, seven hundred eighty-six".