28997336 has 8 divisors (see below), whose sum is σ = 54370020. Its totient is φ = 14498664.

The previous prime is 28997333. The next prime is 28997341. The reversal of 28997336 is 63379982.

It is a tau number, because it is divible by the number of its divisors (8).

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 polite number, since it can be written as a sum of consecutive naturals, namely, 1812326 + ... + 1812341.

Almost surely, 2^28997336 is an apocalyptic number.

It is an amenable number.

28997336 is a deficient number, since it is larger than the sum of its proper divisors (25372684).

28997336 is a wasteful number, since it uses less digits than its factorization.

28997336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3624673 (or 3624669 counting only the distinct ones).

The product of its digits is 489888, while the sum is 47.

The square root of 28997336 is about 5384.9174552634. The cubic root of 28997336 is about 307.2222746345. Note that the first 4 decimals are identical.

The spelling of 28997336 in words is "twenty-eight million, nine hundred ninety-seven thousand, three hundred thirty-six".