28320642352 has 20 divisors (see below), whose sum is σ = 54895080240. Its totient is φ = 14154170048.

The previous prime is 28320642331. The next prime is 28320642367. The reversal of 28320642352 is 25324602382.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346348 + ... + 420235.

It is an arithmetic number, because the mean of its divisors is an integer number (2744754012).

Almost surely, 2^28320642352 is an apocalyptic number.

It is an amenable number.

28320642352 is a deficient number, since it is larger than the sum of its proper divisors (26574437888).

28320642352 is a wasteful number, since it uses less digits than its factorization.

28320642352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768900 (or 768894 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 28320642352 in words is "twenty-eight billion, three hundred twenty million, six hundred forty-two thousand, three hundred fifty-two".