28347963 has 8 divisors (see below), whose sum is σ = 43196928. Its totient is φ = 16198824.

The previous prime is 28347931. The next prime is 28347967. The reversal of 28347963 is 36974382.

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

It is not a de Polignac number, because 28347963 - 2⁵ = 28347931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28347967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 674931 + ... + 674972.

It is an arithmetic number, because the mean of its divisors is an integer number (5399616).

Almost surely, 2^28347963 is an apocalyptic number.

28347963 is a deficient number, since it is larger than the sum of its proper divisors (14848965).

28347963 is a wasteful number, since it uses less digits than its factorization.

28347963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349913.

The product of its digits is 217728, while the sum is 42.

The square root of 28347963 is about 5324.2805147738. The cubic root of 28347963 is about 304.9116038735.

The spelling of 28347963 in words is "twenty-eight million, three hundred forty-seven thousand, nine hundred sixty-three".