28325778305 has 16 divisors (see below), whose sum is σ = 37094803200. Its totient is φ = 20592908160.

The previous prime is 28325778269. The next prime is 28325778311. The reversal of 28325778305 is 50387752382.

It is a happy number.

It is not a de Polignac number, because 28325778305 - 2²² = 28321584001 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55736 + ... + 244454.

It is an arithmetic number, because the mean of its divisors is an integer number (2318425200).

Almost surely, 2^28325778305 is an apocalyptic number.

It is an amenable number.

28325778305 is a deficient number, since it is larger than the sum of its proper divisors (8769024895).

28325778305 is a wasteful number, since it uses less digits than its factorization.

28325778305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191464.

The product of its (nonzero) digits is 2822400, while the sum is 50.

The spelling of 28325778305 in words is "twenty-eight billion, three hundred twenty-five million, seven hundred seventy-eight thousand, three hundred five".