28140046357 has 4 divisors (see below), whose sum is σ = 28285849900. Its totient is φ = 27994242816.

The previous prime is 28140046339. The next prime is 28140046379. The reversal of 28140046357 is 75364004182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17773955761 + 10366090596 = 133319^2 + 101814^2 .

It is a cyclic number.

It is not a de Polignac number, because 28140046357 - 2¹⁹ = 28139522069 is a prime.

It is a super-3 number, since 3×28140046357³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28140046307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72901482 + ... + 72901867.

It is an arithmetic number, because the mean of its divisors is an integer number (7071462475).

Almost surely, 2^28140046357 is an apocalyptic number.

It is an amenable number.

28140046357 is a deficient number, since it is larger than the sum of its proper divisors (145803543).

28140046357 is a wasteful number, since it uses less digits than its factorization.

28140046357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145803542.

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 28140046357 in words is "twenty-eight billion, one hundred forty million, forty-six thousand, three hundred fifty-seven".