28340553644 has 24 divisors (see below), whose sum is σ = 53443247088. Its totient is φ = 13072368960.

The previous prime is 28340553607. The next prime is 28340553673. The reversal of 28340553644 is 44635504382.

It is a junction number, because it is equal to n+sod(n) for n = 28340553595 and 28340553604.

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, 76787 + ... + 250154.

It is an arithmetic number, because the mean of its divisors is an integer number (2226801962).

Almost surely, 2^28340553644 is an apocalyptic number.

It is an amenable number.

28340553644 is a deficient number, since it is larger than the sum of its proper divisors (25102693444).

28340553644 is a wasteful number, since it uses less digits than its factorization.

28340553644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328625 (or 328623 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 44.

The spelling of 28340553644 in words is "twenty-eight billion, three hundred forty million, five hundred fifty-three thousand, six hundred forty-four".