8391748 has 12 divisors (see below), whose sum is σ = 15082732. Its totient is φ = 4082400.

The previous prime is 8391743. The next prime is 8391767. The reversal of 8391748 is 8471938.

It can be written as a sum of positive squares in 2 ways, for example, as 6563844 + 1827904 = 2562^2 + 1352^2 .

It is a d-powerful number, because it can be written as 8⁷ + 3⁶ + 9 + 1 + 7⁴ + 4¹¹ + 8⁷ .

It is a self number, because there is not a number n which added to its sum of digits gives 8391748.

It is not an unprimeable number, because it can be changed into a prime (8391743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28203 + ... + 28498.

Almost surely, 2^8391748 is an apocalyptic number.

It is an amenable number.

8391748 is a deficient number, since it is larger than the sum of its proper divisors (6690984).

8391748 is a wasteful number, since it uses less digits than its factorization.

8391748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56742 (or 56740 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 8391748 is about 2896.8513941865. The cubic root of 8391748 is about 203.2126836586.

The spelling of 8391748 in words is "eight million, three hundred ninety-one thousand, seven hundred forty-eight".