28244069 has 16 divisors (see below), whose sum is σ = 34775040. Its totient is φ = 22405680.

The previous prime is 28244059. The next prime is 28244101. The reversal of 28244069 is 96044282.

It is not a de Polignac number, because 28244069 - 2⁴ = 28244053 is a prime.

It is a super-2 number, since 2×28244069² = 1595454867353522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28244059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2162 + ... + 7820.

It is an arithmetic number, because the mean of its divisors is an integer number (2173440).

Almost surely, 2^28244069 is an apocalyptic number.

It is an amenable number.

28244069 is a deficient number, since it is larger than the sum of its proper divisors (6530971).

28244069 is a wasteful number, since it uses less digits than its factorization.

28244069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5720.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 28244069 is about 5314.5149355327. The cubic root of 28244069 is about 304.5386521469.

The spelling of 28244069 in words is "twenty-eight million, two hundred forty-four thousand, sixty-nine".