28204581044 has 6 divisors (see below), whose sum is σ = 49358016834. Its totient is φ = 14102290520.

The previous prime is 28204581029. The next prime is 28204581079. The reversal of 28204581044 is 44018540282.

It can be written as a sum of positive squares in only one way, i.e., 23476368400 + 4728212644 = 153220^2 + 68762^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28204580989 and 28204581007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3525572627 + ... + 3525572634.

It is an arithmetic number, because the mean of its divisors is an integer number (8226336139).

Almost surely, 2^28204581044 is an apocalyptic number.

It is an amenable number.

28204581044 is a deficient number, since it is larger than the sum of its proper divisors (21153435790).

28204581044 is a wasteful number, since it uses less digits than its factorization.

28204581044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7051145265 (or 7051145263 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 38.

The spelling of 28204581044 in words is "twenty-eight billion, two hundred four million, five hundred eighty-one thousand, forty-four".