28480128703 has 4 divisors (see below), whose sum is σ = 30670907848. Its totient is φ = 26289349560.

The previous prime is 28480128653. The next prime is 28480128727. The reversal of 28480128703 is 30782108482.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28480128703 is a prime.

It is a super-2 number, since 2×28480128703² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28480128703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28480128503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1095389553 + ... + 1095389578.

It is an arithmetic number, because the mean of its divisors is an integer number (7667726962).

Almost surely, 2^28480128703 is an apocalyptic number.

28480128703 is a deficient number, since it is larger than the sum of its proper divisors (2190779145).

28480128703 is a wasteful number, since it uses less digits than its factorization.

28480128703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2190779144.

The product of its (nonzero) digits is 172032, while the sum is 43.

The spelling of 28480128703 in words is "twenty-eight billion, four hundred eighty million, one hundred twenty-eight thousand, seven hundred three".