28705606 has 4 divisors (see below), whose sum is σ = 43058412. Its totient is φ = 14352802.

The previous prime is 28705603. The next prime is 28705613. The reversal of 28705606 is 60650782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60650782 = 2 ⋅30325391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28705601) 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 as a sum of consecutive naturals, namely, 7176400 + ... + 7176403.

It is an arithmetic number, because the mean of its divisors is an integer number (10764603).

Almost surely, 2^28705606 is an apocalyptic number.

28705606 is a deficient number, since it is larger than the sum of its proper divisors (14352806).

28705606 is a wasteful number, since it uses less digits than its factorization.

28705606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14352805.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 28705606 is about 5357.7612862090. The cubic root of 28705606 is about 306.1885221035.

The spelling of 28705606 in words is "twenty-eight million, seven hundred five thousand, six hundred six".