28130072493 has 8 divisors (see below), whose sum is σ = 37981532800. Its totient is φ = 18515996928.

The previous prime is 28130072491. The next prime is 28130072501. The reversal of 28130072493 is 39427003182.

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

It is not a de Polignac number, because 28130072493 - 2¹ = 28130072491 is a prime.

It is a super-2 number, since 2×28130072493² (a number of 22 digits) contains 22 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 (28130072491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59345908 + ... + 59346381.

It is an arithmetic number, because the mean of its divisors is an integer number (4747691600).

Almost surely, 2^28130072493 is an apocalyptic number.

It is an amenable number.

28130072493 is a deficient number, since it is larger than the sum of its proper divisors (9851460307).

28130072493 is a wasteful number, since it uses less digits than its factorization.

28130072493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118692371.

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 28130072493 in words is "twenty-eight billion, one hundred thirty million, seventy-two thousand, four hundred ninety-three".