28705941 has 32 divisors (see below), whose sum is σ = 48844800. Its totient is φ = 16478640.

The previous prime is 28705933. The next prime is 28705951. The reversal of 28705941 is 14950782.

It is not a de Polignac number, because 28705941 - 2³ = 28705933 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28705896 and 28705905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28705921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3100 + ... + 8186.

It is an arithmetic number, because the mean of its divisors is an integer number (1526400).

Almost surely, 2^28705941 is an apocalyptic number.

It is an amenable number.

28705941 is a deficient number, since it is larger than the sum of its proper divisors (20138859).

28705941 is a wasteful number, since it uses less digits than its factorization.

28705941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5126 (or 5120 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 28705941 is about 5357.7925491755. The cubic root of 28705941 is about 306.1897131920.

It can be divided in two parts, 28705 and 941, that added together give a triangular number (29646 = T₂₄₃).

The spelling of 28705941 in words is "twenty-eight million, seven hundred five thousand, nine hundred forty-one".