28631008849 has 9 divisors (see below), whose sum is σ = 29353470811. Its totient is φ = 27925923280.

The previous prime is 28631008841. The next prime is 28631008867. The reversal of 28631008849 is 94880013682.

The square root of 28631008849 is 169207.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1379602449 + 27251406400 = 37143^2 + 165080^2 .

It is not a de Polignac number, because 28631008849 - 2³ = 28631008841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28631008841) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6935424 + ... + 6939550.

Almost surely, 2^28631008849 is an apocalyptic number.

28631008849 is the 169207-th square number.

28631008849 is the 84604-th centered octagonal number.

It is an amenable number.

28631008849 is a deficient number, since it is larger than the sum of its proper divisors (722461962).

28631008849 is an frugal number, since it uses more digits than its factorization.

28631008849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8336 (or 4168 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 49.

Multiplying 28631008849 by its sum of digits (49), we get a square (1402919433601 = 1184449²).

The spelling of 28631008849 in words is "twenty-eight billion, six hundred thirty-one million, eight thousand, eight hundred forty-nine".