28291336 has 16 divisors (see below), whose sum is σ = 53203500. Its totient is φ = 14103744.

The previous prime is 28291279. The next prime is 28291343. The reversal of 28291336 is 63319282.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26071236 + 2220100 = 5106^2 + 1490^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2275 + ... + 7858.

Almost surely, 2^28291336 is an apocalyptic number.

It is an amenable number.

28291336 is a deficient number, since it is larger than the sum of its proper divisors (24912164).

28291336 is a wasteful number, since it uses less digits than its factorization.

28291336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10488 (or 10484 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 28291336 is about 5318.9600487313. The cubic root of 28291336 is about 304.7084412571.

The spelling of 28291336 in words is "twenty-eight million, two hundred ninety-one thousand, three hundred thirty-six".