28043069 has 8 divisors (see below), whose sum is σ = 29639040. Its totient is φ = 26459136.

The previous prime is 28043053. The next prime is 28043117. The reversal of 28043069 is 96034082.

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 28043069 - 2⁴ = 28043053 is a prime.

It is a super-2 number, since 2×28043069² = 1572827437877522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28043369) 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 7 ways as a sum of consecutive naturals, for example, 2012 + ... + 7754.

It is an arithmetic number, because the mean of its divisors is an integer number (3704880).

Almost surely, 2^28043069 is an apocalyptic number.

It is an amenable number.

28043069 is a deficient number, since it is larger than the sum of its proper divisors (1595971).

28043069 is a wasteful number, since it uses less digits than its factorization.

28043069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6019.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 28043069 is about 5295.5706963461. The cubic root of 28043069 is about 303.8145112969.

The spelling of 28043069 in words is "twenty-eight million, forty-three thousand, sixty-nine".