28131267813 has 8 divisors (see below), whose sum is σ = 40918207776. Its totient is φ = 17049253200.

The previous prime is 28131267767. The next prime is 28131267821. The reversal of 28131267813 is 31876213182.

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

It is not a de Polignac number, because 28131267813 - 2¹² = 28131263717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28131267013) 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, 426231298 + ... + 426231363.

It is an arithmetic number, because the mean of its divisors is an integer number (5114775972).

Almost surely, 2^28131267813 is an apocalyptic number.

It is an amenable number.

28131267813 is a deficient number, since it is larger than the sum of its proper divisors (12786939963).

28131267813 is a wasteful number, since it uses less digits than its factorization.

28131267813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852462675.

The product of its digits is 96768, while the sum is 42.

The spelling of 28131267813 in words is "twenty-eight billion, one hundred thirty-one million, two hundred sixty-seven thousand, eight hundred thirteen".