28130269481 has 4 divisors (see below), whose sum is σ = 29610810000. Its totient is φ = 26649728964.

The previous prime is 28130269451. The next prime is 28130269493. The reversal of 28130269481 is 18496203182.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28130269481 - 2²⁶ = 28063160617 is a prime.

It is a super-2 number, since 2×28130269481² (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 (28130269451) 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 3 ways as a sum of consecutive naturals, for example, 740270231 + ... + 740270268.

It is an arithmetic number, because the mean of its divisors is an integer number (7402702500).

Almost surely, 2^28130269481 is an apocalyptic number.

It is an amenable number.

28130269481 is a deficient number, since it is larger than the sum of its proper divisors (1480540519).

28130269481 is a wasteful number, since it uses less digits than its factorization.

28130269481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480540518.

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 28130269481 in words is "twenty-eight billion, one hundred thirty million, two hundred sixty-nine thousand, four hundred eighty-one".