28761424146281 has 8 divisors (see below), whose sum is σ = 30453320165544. Its totient is φ = 27069533409280.

The previous prime is 28761424146277. The next prime is 28761424146347. The reversal of 28761424146281 is 18264142416782.

It can be written as a sum of positive squares in 4 ways, for example, as 13053162023056 + 15708262123225 = 3612916^2 + 3963365^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28761424146281 - 2² = 28761424146277 is a prime.

It is a super-2 number, since 2×28761424146281² (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 (28761424146781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17797721 + ... + 19346361.

It is an arithmetic number, because the mean of its divisors is an integer number (3806665020693).

Almost surely, 2^{28761424146281} is an apocalyptic number.

It is an amenable number.

28761424146281 is a deficient number, since it is larger than the sum of its proper divisors (1691896019263).

28761424146281 is a wasteful number, since it uses less digits than its factorization.

28761424146281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2641131.

The product of its digits is 8257536, while the sum is 56.

The spelling of 28761424146281 in words is "twenty-eight trillion, seven hundred sixty-one billion, four hundred twenty-four million, one hundred forty-six thousand, two hundred eighty-one".