28992243 has 16 divisors (see below), whose sum is σ = 44315136. Its totient is φ = 16515840.

The previous prime is 28992241. The next prime is 28992247. The reversal of 28992243 is 34229982.

It is a happy number.

It is not a de Polignac number, because 28992243 - 2¹ = 28992241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28992241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5458 + ... + 9368.

It is an arithmetic number, because the mean of its divisors is an integer number (2769696).

Almost surely, 2^28992243 is an apocalyptic number.

28992243 is a deficient number, since it is larger than the sum of its proper divisors (15322893).

28992243 is a wasteful number, since it uses less digits than its factorization.

28992243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4274.

The product of its digits is 62208, while the sum is 39.

The square root of 28992243 is about 5384.4445395974. Note that the first 3 decimals coincide. The cubic root of 28992243 is about 307.2042870665.

The spelling of 28992243 in words is "twenty-eight million, nine hundred ninety-two thousand, two hundred forty-three".