28504291001481 has 9 divisors (see below), whose sum is σ = 41172887915341. Its totient is φ = 19002849989772.

The previous prime is 28504291001447. The next prime is 28504291001521. The reversal of 28504291001481 is 18410019240582.

The square root of 28504291001481 is 5338941.

It is a perfect power (a square), and thus also a powerful number.

28504291001481 is a `hidden beast` number, since 2 + 8 + 504 + 29 + 100 + 14 + 8 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 28504291001481 - 2⁴³ = 19708197979273 is a prime.

It is a super-2 number, since 2×28504291001481² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28504291000481) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 15127000 + ... + 16906646.

Almost surely, 2^{28504291001481} is an apocalyptic number.

28504291001481 is the 5338941-st square number.

28504291001481 is the 2669471-st centered octagonal number.

It is an amenable number.

28504291001481 is a deficient number, since it is larger than the sum of its proper divisors (12668596913860).

28504291001481 is an frugal number, since it uses more digits than its factorization.

28504291001481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3559300 (or 1779650 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The spelling of 28504291001481 in words is "twenty-eight trillion, five hundred four billion, two hundred ninety-one million, one thousand, four hundred eighty-one".