28429448 has 16 divisors (see below), whose sum is σ = 53905500. Its totient is φ = 14054656.

The previous prime is 28429433. The next prime is 28429451. The reversal of 28429448 is 84492482.

It can be written as a sum of positive squares in 2 ways, for example, as 25989604 + 2439844 = 5098^2 + 1562^2 .

It is an unprimeable number.

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, 19253 + ... + 20676.

Almost surely, 2^28429448 is an apocalyptic number.

It is an amenable number.

28429448 is a deficient number, since it is larger than the sum of its proper divisors (25476052).

28429448 is a wasteful number, since it uses less digits than its factorization.

28429448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40024 (or 40020 counting only the distinct ones).

The product of its digits is 147456, while the sum is 41.

The square root of 28429448 is about 5331.9272313114. The cubic root of 28429448 is about 305.2034761560.

The spelling of 28429448 in words is "twenty-eight million, four hundred twenty-nine thousand, four hundred forty-eight".