28645835749 has 16 divisors (see below), whose sum is σ = 30171119616. Its totient is φ = 27165024000.

The previous prime is 28645835717. The next prime is 28645835791. The reversal of 28645835749 is 94753854682.

It is a cyclic number.

It is not a de Polignac number, because 28645835749 - 2⁵ = 28645835717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28645835549) 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, 384924 + ... + 453274.

It is an arithmetic number, because the mean of its divisors is an integer number (1885694976).

Almost surely, 2^28645835749 is an apocalyptic number.

It is an amenable number.

28645835749 is a deficient number, since it is larger than the sum of its proper divisors (1525283867).

28645835749 is a wasteful number, since it uses less digits than its factorization.

28645835749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68676.

The product of its digits is 58060800, while the sum is 61.

The spelling of 28645835749 in words is "twenty-eight billion, six hundred forty-five million, eight hundred thirty-five thousand, seven hundred forty-nine".