28025279645 has 16 divisors (see below), whose sum is σ = 36955441728. Its totient is φ = 20233242240.

The previous prime is 28025279641. The next prime is 28025279651. The reversal of 28025279645 is 54697252082.

It is not a de Polignac number, because 28025279645 - 2² = 28025279641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28025279593 and 28025279602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28025279641) 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, 1852139 + ... + 1867208.

It is an arithmetic number, because the mean of its divisors is an integer number (2309715108).

Almost surely, 2^28025279645 is an apocalyptic number.

It is an amenable number.

28025279645 is a deficient number, since it is larger than the sum of its proper divisors (8930162083).

28025279645 is a wasteful number, since it uses less digits than its factorization.

28025279645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3719500.

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 28025279645 in words is "twenty-eight billion, twenty-five million, two hundred seventy-nine thousand, six hundred forty-five".