28997366 has 4 divisors (see below), whose sum is σ = 43496052. Its totient is φ = 14498682.

The previous prime is 28997347. The next prime is 28997377. The reversal of 28997366 is 66379982.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7249340 + ... + 7249343.

It is an arithmetic number, because the mean of its divisors is an integer number (10874013).

Almost surely, 2^28997366 is an apocalyptic number.

28997366 is a deficient number, since it is larger than the sum of its proper divisors (14498686).

28997366 is a wasteful number, since it uses less digits than its factorization.

28997366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14498685.

The product of its digits is 979776, while the sum is 50.

The square root of 28997366 is about 5384.9202408207. The cubic root of 28997366 is about 307.2223805829. Note that the first 3 decimals are identical.

The spelling of 28997366 in words is "twenty-eight million, nine hundred ninety-seven thousand, three hundred sixty-six".