28547311631 has 8 divisors (see below), whose sum is σ = 29355132240. Its totient is φ = 27741400128.

The previous prime is 28547311627. The next prime is 28547311633. The reversal of 28547311631 is 13611374582.

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

It is a cyclic number.

It is not a de Polignac number, because 28547311631 - 2² = 28547311627 is a prime.

It is a super-2 number, since 2×28547311631² (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 (28547311633) 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 7 ways as a sum of consecutive naturals, for example, 446921 + ... + 506786.

It is an arithmetic number, because the mean of its divisors is an integer number (3669391530).

Almost surely, 2^28547311631 is an apocalyptic number.

28547311631 is a deficient number, since it is larger than the sum of its proper divisors (807820609).

28547311631 is an equidigital number, since it uses as much as digits as its factorization.

28547311631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954553.

The product of its digits is 120960, while the sum is 41.

The spelling of 28547311631 in words is "twenty-eight billion, five hundred forty-seven million, three hundred eleven thousand, six hundred thirty-one".