28837069 has 4 divisors (see below), whose sum is σ = 28944540. Its totient is φ = 28729600.

The previous prime is 28837031. The next prime is 28837073. The reversal of 28837069 is 96073882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96073882 = 2 ⋅48036941.

It can be written as a sum of positive squares in 2 ways, for example, as 1932100 + 26904969 = 1390^2 + 5187^2 .

It is a cyclic number.

It is not a de Polignac number, because 28837069 - 2⁹ = 28836557 is a prime.

It is a super-2 number, since 2×28837069² = 1663153097021522, 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 (28837019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53332 + ... + 53869.

It is an arithmetic number, because the mean of its divisors is an integer number (7236135).

Almost surely, 2^28837069 is an apocalyptic number.

It is an amenable number.

28837069 is a deficient number, since it is larger than the sum of its proper divisors (107471).

28837069 is a wasteful number, since it uses less digits than its factorization.

28837069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107470.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 28837069 is about 5370.0157355449. The cubic root of 28837069 is about 306.6552273353.

The spelling of 28837069 in words is "twenty-eight million, eight hundred thirty-seven thousand, sixty-nine".