28242433 has 8 divisors (see below), whose sum is σ = 30007080. Its totient is φ = 26530560.

The previous prime is 28242407. The next prime is 28242449. The reversal of 28242433 is 33424282.

It can be written as a sum of positive squares in 4 ways, for example, as 17372224 + 10870209 = 4168^2 + 3297^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28242433 - 2⁹ = 28241921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28242463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12088 + ... + 14233.

It is an arithmetic number, because the mean of its divisors is an integer number (3750885).

Almost surely, 2^28242433 is an apocalyptic number.

It is an amenable number.

28242433 is a deficient number, since it is larger than the sum of its proper divisors (1764647).

28242433 is a wasteful number, since it uses less digits than its factorization.

28242433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26387.

The product of its digits is 9216, while the sum is 28.

The square root of 28242433 is about 5314.3610152115. The cubic root of 28242433 is about 304.5327720351.

The spelling of 28242433 in words is "twenty-eight million, two hundred forty-two thousand, four hundred thirty-three".