28997355 has 16 divisors (see below), whose sum is σ = 47384064. Its totient is φ = 15135840.

The previous prime is 28997347. The next prime is 28997377. The reversal of 28997355 is 55379982.

It is a happy number.

It is not a de Polignac number, because 28997355 - 2³ = 28997347 is a prime.

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 in 15 ways as a sum of consecutive naturals, for example, 19861 + ... + 21270.

It is an arithmetic number, because the mean of its divisors is an integer number (2961504).

Almost surely, 2^28997355 is an apocalyptic number.

28997355 is a deficient number, since it is larger than the sum of its proper divisors (18386709).

28997355 is a wasteful number, since it uses less digits than its factorization.

28997355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41186.

The product of its digits is 680400, while the sum is 48.

The square root of 28997355 is about 5384.9192194498. The cubic root of 28997355 is about 307.2223417352. Note that the first 3 decimals are identical.

The spelling of 28997355 in words is "twenty-eight million, nine hundred ninety-seven thousand, three hundred fifty-five".