28645873502 has 4 divisors (see below), whose sum is σ = 42968810256. Its totient is φ = 14322936750.

The previous prime is 28645873499. The next prime is 28645873541. The reversal of 28645873502 is 20537854682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20537854682 = 2 ⋅10268927341.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7161468374 + ... + 7161468377.

It is an arithmetic number, because the mean of its divisors is an integer number (10742202564).

Almost surely, 2^28645873502 is an apocalyptic number.

28645873502 is a deficient number, since it is larger than the sum of its proper divisors (14322936754).

28645873502 is a wasteful number, since it uses less digits than its factorization.

28645873502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14322936753.

The product of its (nonzero) digits is 3225600, while the sum is 50.

The spelling of 28645873502 in words is "twenty-eight billion, six hundred forty-five million, eight hundred seventy-three thousand, five hundred two".