28343039 has 4 divisors (see below), whose sum is σ = 28501560. Its totient is φ = 28184520.

The previous prime is 28343023. The next prime is 28343047. The reversal of 28343039 is 93034382.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28343039 - 2⁴ = 28343023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28342996 and 28343014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28343009) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 78992 + ... + 79349.

It is an arithmetic number, because the mean of its divisors is an integer number (7125390).

Almost surely, 2^28343039 is an apocalyptic number.

28343039 is a deficient number, since it is larger than the sum of its proper divisors (158521).

28343039 is a wasteful number, since it uses less digits than its factorization.

28343039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158520.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 28343039 is about 5323.8180847959. The cubic root of 28343039 is about 304.8939486170.

The spelling of 28343039 in words is "twenty-eight million, three hundred forty-three thousand, thirty-nine".