28296449 has 8 divisors (see below), whose sum is σ = 30018600. Its totient is φ = 26580736.

The previous prime is 28296439. The next prime is 28296461. The reversal of 28296449 is 94469282.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10445824 + 17850625 = 3232^2 + 4225^2 .

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 28296449 - 2¹² = 28292353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28296409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9827 + ... + 12375.

It is an arithmetic number, because the mean of its divisors is an integer number (3752325).

Almost surely, 2^28296449 is an apocalyptic number.

It is an amenable number.

28296449 is a deficient number, since it is larger than the sum of its proper divisors (1722151).

28296449 is a wasteful number, since it uses less digits than its factorization.

28296449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3219.

The product of its digits is 248832, while the sum is 44.

The square root of 28296449 is about 5319.4406660851. The cubic root of 28296449 is about 304.7267964692.

The spelling of 28296449 in words is "twenty-eight million, two hundred ninety-six thousand, four hundred forty-nine".