28771123 has 8 divisors (see below), whose sum is σ = 30750192. Its totient is φ = 26823936.

The previous prime is 28771121. The next prime is 28771139. The reversal of 28771123 is 32117782.

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 28771123 - 2¹ = 28771121 is a prime.

It is a super-2 number, since 2×28771123² = 1655555037362258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28771121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6090 + ... + 9727.

It is an arithmetic number, because the mean of its divisors is an integer number (3843774).

Almost surely, 2^28771123 is an apocalyptic number.

28771123 is a deficient number, since it is larger than the sum of its proper divisors (1979069).

28771123 is a wasteful number, since it uses less digits than its factorization.

28771123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15941.

The product of its digits is 4704, while the sum is 31.

The square root of 28771123 is about 5363.8720156245. The cubic root of 28771123 is about 306.4212909317.

The spelling of 28771123 in words is "twenty-eight million, seven hundred seventy-one thousand, one hundred twenty-three".