28438608004 has 6 divisors (see below), whose sum is σ = 49767564014. Its totient is φ = 14219304000.

The previous prime is 28438607987. The next prime is 28438608007. The reversal of 28438608004 is 40080683482.

It can be written as a sum of positive squares in only one way, i.e., 18428605504 + 10010002500 = 135752^2 + 100050^2 .

It is not an unprimeable number, because it can be changed into a prime (28438608007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3554825997 + ... + 3554826004.

Almost surely, 2^28438608004 is an apocalyptic number.

It is an amenable number.

28438608004 is a deficient number, since it is larger than the sum of its proper divisors (21328956010).

28438608004 is a wasteful number, since it uses less digits than its factorization.

28438608004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7109652005 (or 7109652003 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 43.

The spelling of 28438608004 in words is "twenty-eight billion, four hundred thirty-eight million, six hundred eight thousand, four".