28641204578 has 16 divisors (see below), whose sum is σ = 49107124800. Its totient is φ = 12272822736.

The previous prime is 28641204569. The next prime is 28641204587. The reversal of 28641204578 is 87540214682.

It is an interprime number because it is at equal distance from previous prime (28641204569) and next prime (28641204587).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73253 + ... + 250296.

It is an arithmetic number, because the mean of its divisors is an integer number (3069195300).

Almost surely, 2^28641204578 is an apocalyptic number.

28641204578 is a deficient number, since it is larger than the sum of its proper divisors (20465920222).

28641204578 is a wasteful number, since it uses less digits than its factorization.

28641204578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329881.

The product of its (nonzero) digits is 860160, while the sum is 47.

The spelling of 28641204578 in words is "twenty-eight billion, six hundred forty-one million, two hundred four thousand, five hundred seventy-eight".