28997335 has 8 divisors (see below), whose sum is σ = 34828416. Its totient is φ = 23176800.

The previous prime is 28997333. The next prime is 28997341. The reversal of 28997335 is 53379982.

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

It is not a de Polignac number, because 28997335 - 2¹ = 28997333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28997333) 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 7 ways as a sum of consecutive naturals, for example, 5985 + ... + 9685.

It is an arithmetic number, because the mean of its divisors is an integer number (4353552).

Almost surely, 2^28997335 is an apocalyptic number.

28997335 is a deficient number, since it is larger than the sum of its proper divisors (5831081).

28997335 is a wasteful number, since it uses less digits than its factorization.

28997335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5273.

The product of its digits is 408240, while the sum is 46.

The square root of 28997335 is about 5384.9173624114. The cubic root of 28997335 is about 307.2222711029. Note that the first 4 decimals are identical.

The spelling of 28997335 in words is "twenty-eight million, nine hundred ninety-seven thousand, three hundred thirty-five".