28705726 has 16 divisors (see below), whose sum is σ = 49904640. Its totient is φ = 12128760.

The previous prime is 28705711. The next prime is 28705727. The reversal of 28705726 is 62750782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28705727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13446 + ... + 15433.

It is an arithmetic number, because the mean of its divisors is an integer number (3119040).

Almost surely, 2^28705726 is an apocalyptic number.

28705726 is a deficient number, since it is larger than the sum of its proper divisors (21198914).

28705726 is a wasteful number, since it uses less digits than its factorization.

28705726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28959.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 28705726 is about 5357.7724849045. The cubic root of 28705726 is about 306.1889487631.

The spelling of 28705726 in words is "twenty-eight million, seven hundred five thousand, seven hundred twenty-six".