28601745729 has 16 divisors (see below), whose sum is σ = 39457234944. Its totient is φ = 18409899600.

The previous prime is 28601745721. The next prime is 28601745787. The reversal of 28601745729 is 92754710682.

It is a happy number.

It is not a de Polignac number, because 28601745729 - 2³ = 28601745721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28601745721) 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, 316699 + ... + 396864.

It is an arithmetic number, because the mean of its divisors is an integer number (2466077184).

Almost surely, 2^28601745729 is an apocalyptic number.

It is an amenable number.

28601745729 is a deficient number, since it is larger than the sum of its proper divisors (10855489215).

28601745729 is a wasteful number, since it uses less digits than its factorization.

28601745729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714028.

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 28601745729 in words is "twenty-eight billion, six hundred one million, seven hundred forty-five thousand, seven hundred twenty-nine".