28360025749 has 4 divisors (see below), whose sum is σ = 30938209920. Its totient is φ = 25781841580.

The previous prime is 28360025747. The next prime is 28360025761. The reversal of 28360025749 is 94752006382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28360025749 - 2¹ = 28360025747 is a prime.

It is a super-2 number, since 2×28360025749² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28360025699 and 28360025708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28360025747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1289092069 + ... + 1289092090.

It is an arithmetic number, because the mean of its divisors is an integer number (7734552480).

Almost surely, 2^28360025749 is an apocalyptic number.

It is an amenable number.

28360025749 is a deficient number, since it is larger than the sum of its proper divisors (2578184171).

28360025749 is a wasteful number, since it uses less digits than its factorization.

28360025749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578184170.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 28360025749 in words is "twenty-eight billion, three hundred sixty million, twenty-five thousand, seven hundred forty-nine".