28899547 has 4 divisors (see below), whose sum is σ = 29604456. Its totient is φ = 28194640.

The previous prime is 28899539. The next prime is 28899587. The reversal of 28899547 is 74599882.

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

It is a cyclic number.

It is not a de Polignac number, because 28899547 - 2³ = 28899539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28899494 and 28899503.

It is not an unprimeable number, because it can be changed into a prime (28899587) 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, 352393 + ... + 352474.

It is an arithmetic number, because the mean of its divisors is an integer number (7401114).

Almost surely, 2^28899547 is an apocalyptic number.

28899547 is a deficient number, since it is larger than the sum of its proper divisors (704909).

28899547 is an equidigital number, since it uses as much as digits as its factorization.

28899547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704908.

The product of its digits is 1451520, while the sum is 52.

The square root of 28899547 is about 5375.8298894217. The cubic root of 28899547 is about 306.8765325962.

The spelling of 28899547 in words is "twenty-eight million, eight hundred ninety-nine thousand, five hundred forty-seven".