28699394 has 8 divisors (see below), whose sum is σ = 43861500. Its totient is φ = 14078896.

The previous prime is 28699387. The next prime is 28699399. The reversal of 28699394 is 49399682.

It can be written as a sum of positive squares in 2 ways, for example, as 28462225 + 237169 = 5335^2 + 487^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28699399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135269 + ... + 135480.

Almost surely, 2^28699394 is an apocalyptic number.

28699394 is a deficient number, since it is larger than the sum of its proper divisors (15162106).

28699394 is a wasteful number, since it uses less digits than its factorization.

28699394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270804.

The product of its digits is 839808, while the sum is 50.

The square root of 28699394 is about 5357.1815350985. The cubic root of 28699394 is about 306.1664337314.

The spelling of 28699394 in words is "twenty-eight million, six hundred ninety-nine thousand, three hundred ninety-four".