28147832 has 8 divisors (see below), whose sum is σ = 52777200. Its totient is φ = 14073912.

The previous prime is 28147831. The next prime is 28147849. The reversal of 28147832 is 23874182.

28147832 is nontrivially palindromic in base 15.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 28147792 and 28147801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28147831) by changing a digit.

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 as a sum of consecutive naturals, namely, 1759232 + ... + 1759247.

It is an arithmetic number, because the mean of its divisors is an integer number (6597150).

Almost surely, 2^28147832 is an apocalyptic number.

It is an amenable number.

28147832 is a deficient number, since it is larger than the sum of its proper divisors (24629368).

28147832 is a wasteful number, since it uses less digits than its factorization.

28147832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518485 (or 3518481 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 28147832 is about 5305.4530438031. The cubic root of 28147832 is about 304.1923701637.

The spelling of 28147832 in words is "twenty-eight million, one hundred forty-seven thousand, eight hundred thirty-two".