28947349 has 4 divisors (see below), whose sum is σ = 29014636. Its totient is φ = 28880064.

The previous prime is 28947341. The next prime is 28947361. The reversal of 28947349 is 94374982.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17489124 + 11458225 = 4182^2 + 3385^2 .

It is a cyclic number.

It is not a de Polignac number, because 28947349 - 2³ = 28947341 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28947299 and 28947308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28947341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32994 + ... + 33859.

It is an arithmetic number, because the mean of its divisors is an integer number (7253659).

Almost surely, 2^28947349 is an apocalyptic number.

It is an amenable number.

28947349 is a deficient number, since it is larger than the sum of its proper divisors (67287).

28947349 is an equidigital number, since it uses as much as digits as its factorization.

28947349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67286.

The product of its digits is 435456, while the sum is 46.

The square root of 28947349 is about 5380.2740636514. The cubic root of 28947349 is about 307.0456382618.

The spelling of 28947349 in words is "twenty-eight million, nine hundred forty-seven thousand, three hundred forty-nine".