28662706 has 4 divisors (see below), whose sum is σ = 42994062. Its totient is φ = 14331352.

The previous prime is 28662677. The next prime is 28662707. The reversal of 28662706 is 60726682.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 28037025 + 625681 = 5295^2 + 791^2 .

It is not an unprimeable number, because it can be changed into a prime (28662707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7165675 + ... + 7165678.

Almost surely, 2^28662706 is an apocalyptic number.

28662706 is a deficient number, since it is larger than the sum of its proper divisors (14331356).

28662706 is a wasteful number, since it uses less digits than its factorization.

28662706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14331355.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 28662706 is about 5353.7562514556. The cubic root of 28662706 is about 306.0359150179.

The spelling of 28662706 in words is "twenty-eight million, six hundred sixty-two thousand, seven hundred six".