28614767281 has 3 divisors (see below), whose sum is σ = 28614936441. Its totient is φ = 28614598122.

The previous prime is 28614767263. The next prime is 28614767287. The reversal of 28614767281 is 18276741682.

The square root of 28614767281 is 169159.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 28614767281 - 2⁹ = 28614766769 is a prime.

It is a super-2 number, since 2×28614767281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28614767287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 84580 + ... + 253738.

It is an arithmetic number, because the mean of its divisors is an integer number (9538312147).

Almost surely, 2^28614767281 is an apocalyptic number.

28614767281 is the 169159-th square number.

28614767281 is the 84580-th centered octagonal number.

It is an amenable number.

28614767281 is a deficient number, since it is larger than the sum of its proper divisors (169160).

28614767281 is an frugal number, since it uses more digits than its factorization.

28614767281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338318 (or 169159 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 52.

The spelling of 28614767281 in words is "twenty-eight billion, six hundred fourteen million, seven hundred sixty-seven thousand, two hundred eighty-one".