28147049 has 8 divisors (see below), whose sum is σ = 32292480. Its totient is φ = 24032736.

The previous prime is 28147001. The next prime is 28147073. The reversal of 28147049 is 94074182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28147049 - 2⁸ = 28146793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28147079) 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, 5804 + ... + 9485.

It is an arithmetic number, because the mean of its divisors is an integer number (4036560).

Almost surely, 2^28147049 is an apocalyptic number.

It is an amenable number.

28147049 is a deficient number, since it is larger than the sum of its proper divisors (4145431).

28147049 is a wasteful number, since it uses less digits than its factorization.

28147049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15559.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 28147049 is about 5305.3792512883. The cubic root of 28147049 is about 304.1895495222.

The spelling of 28147049 in words is "twenty-eight million, one hundred forty-seven thousand, forty-nine".