28293625644 has 24 divisors (see below), whose sum is σ = 66025299648. Its totient is φ = 9430231440.

The previous prime is 28293625639. The next prime is 28293625663. The reversal of 28293625644 is 44652639282.

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, 3699 + ... + 237909.

It is an arithmetic number, because the mean of its divisors is an integer number (2751054152).

Almost surely, 2^28293625644 is an apocalyptic number.

It is an amenable number.

28293625644 is an abundant number, since it is smaller than the sum of its proper divisors (37731674004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28293625644 is a wasteful number, since it uses less digits than its factorization.

28293625644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244285 (or 244283 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 51.

The spelling of 28293625644 in words is "twenty-eight billion, two hundred ninety-three million, six hundred twenty-five thousand, six hundred forty-four".