8128738 has 8 divisors (see below), whose sum is σ = 12393180. Its totient is φ = 3997680.

The previous prime is 8128733. The next prime is 8128741. The reversal of 8128738 is 8378218.

It can be written as a sum of positive squares in 2 ways, for example, as 6671889 + 1456849 = 2583^2 + 1207^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 8128697 and 8128706.

It is not an unprimeable number, because it can be changed into a prime (8128733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33193 + ... + 33436.

Almost surely, 2^8128738 is an apocalyptic number.

8128738 is a deficient number, since it is larger than the sum of its proper divisors (4264442).

8128738 is a wasteful number, since it uses less digits than its factorization.

8128738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66692.

The product of its digits is 21504, while the sum is 37.

The square root of 8128738 is about 2851.0941759261. The cubic root of 8128738 is about 201.0671128908.

The spelling of 8128738 in words is "eight million, one hundred twenty-eight thousand, seven hundred thirty-eight".