28836531369 has 12 divisors (see below), whose sum is σ = 41669863092. Its totient is φ = 19216464000.

The previous prime is 28836531349. The next prime is 28836531443. The reversal of 28836531369 is 96313563882.

It is a happy number.

28836531369 is a `hidden beast` number, since 28 + 83 + 6 + 531 + 3 + 6 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2723587344 + 26112944025 = 52188^2 + 161595^2 .

It is not a de Polignac number, because 28836531369 - 2¹² = 28836527273 is a prime.

It is a super-2 number, since 2×28836531369² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28836531319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 634332 + ... + 678269.

It is an arithmetic number, because the mean of its divisors is an integer number (3472488591).

Almost surely, 2^28836531369 is an apocalyptic number.

It is an amenable number.

28836531369 is a deficient number, since it is larger than the sum of its proper divisors (12833331723).

28836531369 is a wasteful number, since it uses less digits than its factorization.

28836531369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315048 (or 1315045 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

It can be divided in two parts, 28836531 and 369, that added together give a square (28836900 = 5370²).

The spelling of 28836531369 in words is "twenty-eight billion, eight hundred thirty-six million, five hundred thirty-one thousand, three hundred sixty-nine".