28994433 has 8 divisors (see below), whose sum is σ = 41633088. Its totient is φ = 17842704.

The previous prime is 28994431. The next prime is 28994447. The reversal of 28994433 is 33449982.

It is a happy number.

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

It is not a de Polignac number, because 28994433 - 2¹ = 28994431 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28994431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371685 + ... + 371762.

It is an arithmetic number, because the mean of its divisors is an integer number (5204136).

Almost surely, 2^28994433 is an apocalyptic number.

It is an amenable number.

28994433 is a deficient number, since it is larger than the sum of its proper divisors (12638655).

28994433 is a wasteful number, since it uses less digits than its factorization.

28994433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743463.

The product of its digits is 186624, while the sum is 42.

The square root of 28994433 is about 5384.6478993524. The cubic root of 28994433 is about 307.2120220142.

The spelling of 28994433 in words is "twenty-eight million, nine hundred ninety-four thousand, four hundred thirty-three".