28140686494 has 8 divisors (see below), whose sum is σ = 42386179968. Its totient is φ = 14011959840.

The previous prime is 28140686491. The next prime is 28140686501. The reversal of 28140686494 is 49468604182.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28140686491) 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 3 ways as a sum of consecutive naturals, for example, 29191102 + ... + 29192065.

It is an arithmetic number, because the mean of its divisors is an integer number (5298272496).

Almost surely, 2^28140686494 is an apocalyptic number.

28140686494 is a deficient number, since it is larger than the sum of its proper divisors (14245493474).

28140686494 is a wasteful number, since it uses less digits than its factorization.

28140686494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58383410.

The product of its (nonzero) digits is 2654208, while the sum is 52.

The spelling of 28140686494 in words is "twenty-eight billion, one hundred forty million, six hundred eighty-six thousand, four hundred ninety-four".