28735706 has 16 divisors (see below), whose sum is σ = 44447616. Its totient is φ = 13925856.

The previous prime is 28735691. The next prime is 28735709. The reversal of 28735706 is 60753782.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28735706.

It is not an unprimeable number, because it can be changed into a prime (28735709) 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, 8630 + ... + 11486.

It is an arithmetic number, because the mean of its divisors is an integer number (2777976).

Almost surely, 2^28735706 is an apocalyptic number.

28735706 is a deficient number, since it is larger than the sum of its proper divisors (15711910).

28735706 is a wasteful number, since it uses less digits than its factorization.

28735706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3013.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 28735706 is about 5360.5695592913. The cubic root of 28735706 is about 306.2955053303.

The spelling of 28735706 in words is "twenty-eight million, seven hundred thirty-five thousand, seven hundred six".