28696403 has 4 divisors (see below), whose sum is σ = 30206760. Its totient is φ = 27186048.

The previous prime is 28696379. The next prime is 28696417. The reversal of 28696403 is 30469682.

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

It is a cyclic number.

It is not a de Polignac number, because 28696403 - 2¹⁰ = 28695379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28696453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 755150 + ... + 755187.

It is an arithmetic number, because the mean of its divisors is an integer number (7551690).

Almost surely, 2^28696403 is an apocalyptic number.

28696403 is a deficient number, since it is larger than the sum of its proper divisors (1510357).

28696403 is a wasteful number, since it uses less digits than its factorization.

28696403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510356.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 28696403 is about 5356.9023698402. The cubic root of 28696403 is about 306.1557973208.

The spelling of 28696403 in words is "twenty-eight million, six hundred ninety-six thousand, four hundred three".