28900449 has 16 divisors (see below), whose sum is σ = 43861440. Its totient is φ = 18796320.

The previous prime is 28900447. The next prime is 28900477. The reversal of 28900449 is 94400982.

It is a happy number.

It is not a de Polignac number, because 28900449 - 2¹ = 28900447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28900447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11947 + ... + 14160.

It is an arithmetic number, because the mean of its divisors is an integer number (2741340).

Almost surely, 2^28900449 is an apocalyptic number.

It is an amenable number.

28900449 is a deficient number, since it is larger than the sum of its proper divisors (14960991).

28900449 is a wasteful number, since it uses less digits than its factorization.

28900449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26157 (or 26151 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 28900449 is about 5375.9137827908. The cubic root of 28900449 is about 306.8797252616.

The spelling of 28900449 in words is "twenty-eight million, nine hundred thousand, four hundred forty-nine".