28941775 has 6 divisors (see below), whose sum is σ = 35887832. Its totient is φ = 23153400.

The previous prime is 28941767. The next prime is 28941779. The reversal of 28941775 is 57714982.

It is not a de Polignac number, because 28941775 - 2³ = 28941767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28941779) 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 5 ways as a sum of consecutive naturals, for example, 578811 + ... + 578860.

Almost surely, 2^28941775 is an apocalyptic number.

28941775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28941775 is a deficient number, since it is larger than the sum of its proper divisors (6946057).

28941775 is a wasteful number, since it uses less digits than its factorization.

28941775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157681 (or 1157676 counting only the distinct ones).

The product of its digits is 141120, while the sum is 43.

The square root of 28941775 is about 5379.7560353607. The cubic root of 28941775 is about 307.0259291196.

The spelling of 28941775 in words is "twenty-eight million, nine hundred forty-one thousand, seven hundred seventy-five".