28636044729 has 16 divisors (see below), whose sum is σ = 39907803264. Its totient is φ = 18230256000.

The previous prime is 28636044677. The next prime is 28636044737. The reversal of 28636044729 is 92744063682.

It is not a de Polignac number, because 28636044729 - 2⁷ = 28636044601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28636044739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303802 + ... + 386739.

It is an arithmetic number, because the mean of its divisors is an integer number (2494237704).

Almost surely, 2^28636044729 is an apocalyptic number.

It is an amenable number.

28636044729 is a deficient number, since it is larger than the sum of its proper divisors (11271758535).

28636044729 is a wasteful number, since it uses less digits than its factorization.

28636044729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691168.

The product of its (nonzero) digits is 3483648, while the sum is 51.

The spelling of 28636044729 in words is "twenty-eight billion, six hundred thirty-six million, forty-four thousand, seven hundred twenty-nine".