28081815742 has 8 divisors (see below), whose sum is σ = 42209219376. Its totient is φ = 14012075952.

The previous prime is 28081815739. The next prime is 28081815763. The reversal of 28081815742 is 24751818082.

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

It is a junction number, because it is equal to n+sod(n) for n = 28081815692 and 28081815701.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 14414743 + ... + 14416690.

It is an arithmetic number, because the mean of its divisors is an integer number (5276152422).

Almost surely, 2^28081815742 is an apocalyptic number.

28081815742 is a deficient number, since it is larger than the sum of its proper divisors (14127403634).

28081815742 is a wasteful number, since it uses less digits than its factorization.

28081815742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28831922.

The product of its (nonzero) digits is 286720, while the sum is 46.

The spelling of 28081815742 in words is "twenty-eight billion, eighty-one million, eight hundred fifteen thousand, seven hundred forty-two".