28958849 has 8 divisors (see below), whose sum is σ = 30225960. Its totient is φ = 27709696.

The previous prime is 28958779. The next prime is 28958851. The reversal of 28958849 is 94885982.

It can be written as a sum of positive squares in 4 ways, for example, as 5726449 + 23232400 = 2393^2 + 4820^2 .

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 28958849 - 2¹² = 28954753 is a prime.

It is a super-2 number, since 2×28958849² = 1677229870809602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28958849.

It is not an unprimeable number, because it can be changed into a prime (28958879) 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 7 ways as a sum of consecutive naturals, for example, 1142 + ... + 7695.

It is an arithmetic number, because the mean of its divisors is an integer number (3778245).

Almost surely, 2^28958849 is an apocalyptic number.

28958849 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28958849 is a deficient number, since it is larger than the sum of its proper divisors (1267111).

28958849 is a wasteful number, since it uses less digits than its factorization.

28958849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8979.

The product of its digits is 1658880, while the sum is 53.

The square root of 28958849 is about 5381.3426763216. The cubic root of 28958849 is about 307.0862931919.

The spelling of 28958849 in words is "twenty-eight million, nine hundred fifty-eight thousand, eight hundred forty-nine".