28243045 has 8 divisors (see below), whose sum is σ = 34680096. Its totient is φ = 22068816.

The previous prime is 28243021. The next prime is 28243049. The reversal of 28243045 is 54034282.

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 28243045 - 2¹⁵ = 28210277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28243049) 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, 65467 + ... + 65896.

It is an arithmetic number, because the mean of its divisors is an integer number (4335012).

Almost surely, 2^28243045 is an apocalyptic number.

It is an amenable number.

28243045 is a deficient number, since it is larger than the sum of its proper divisors (6437051).

28243045 is a wasteful number, since it uses less digits than its factorization.

28243045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131411.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 28243045 is about 5314.4185947289. The cubic root of 28243045 is about 304.5349717123.

The spelling of 28243045 in words is "twenty-eight million, two hundred forty-three thousand, forty-five".