28788500005131 has 4 divisors (see below), whose sum is σ = 38384666673512. Its totient is φ = 19192333336752.

The previous prime is 28788500005121. The next prime is 28788500005169. The reversal of 28788500005131 is 13150000588782.

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

It is not a de Polignac number, because 28788500005131 - 2¹⁰ = 28788500004107 is a prime.

It is a super-2 number, since 2×28788500005131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28788500005121) 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, 4798083334186 + ... + 4798083334191.

It is an arithmetic number, because the mean of its divisors is an integer number (9596166668378).

Almost surely, 2^{28788500005131} is an apocalyptic number.

28788500005131 is a deficient number, since it is larger than the sum of its proper divisors (9596166668381).

28788500005131 is an equidigital number, since it uses as much as digits as its factorization.

28788500005131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9596166668380.

The product of its (nonzero) digits is 537600, while the sum is 48.

The spelling of 28788500005131 in words is "twenty-eight trillion, seven hundred eighty-eight billion, five hundred million, five thousand, one hundred thirty-one".