28356747 has 8 divisors (see below), whose sum is σ = 37855440. Its totient is φ = 18881280.

The previous prime is 28356739. The next prime is 28356773. The reversal of 28356747 is 74765382.

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

It is not a de Polignac number, because 28356747 - 2³ = 28356739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28356699 and 28356708.

It is not an unprimeable number, because it can be changed into a prime (28356787) 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 in 7 ways as a sum of consecutive naturals, for example, 2722 + ... + 8007.

It is an arithmetic number, because the mean of its divisors is an integer number (4731930).

Almost surely, 2^28356747 is an apocalyptic number.

28356747 is a deficient number, since it is larger than the sum of its proper divisors (9498693).

28356747 is a wasteful number, since it uses less digits than its factorization.

28356747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11613.

The product of its digits is 282240, while the sum is 42.

The square root of 28356747 is about 5325.1053510705. The cubic root of 28356747 is about 304.9430942835.

The spelling of 28356747 in words is "twenty-eight million, three hundred fifty-six thousand, seven hundred forty-seven".