28038447361 has 12 divisors (see below), whose sum is σ = 29791286140. Its totient is φ = 26383368960.

The previous prime is 28038447317. The next prime is 28038447373. The reversal of 28038447361 is 16374483082.

It can be written as a sum of positive squares in 6 ways, for example, as 264225025 + 27774222336 = 16255^2 + 166656^2 .

It is not a de Polignac number, because 28038447361 - 2²⁹ = 27501576449 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28038447061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1931671 + ... + 1946131.

Almost surely, 2^28038447361 is an apocalyptic number.

It is an amenable number.

28038447361 is a deficient number, since it is larger than the sum of its proper divisors (1752838779).

28038447361 is a wasteful number, since it uses less digits than its factorization.

28038447361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21204 (or 21187 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 46.

The spelling of 28038447361 in words is "twenty-eight billion, thirty-eight million, four hundred forty-seven thousand, three hundred sixty-one".