328765138 has 32 divisors (see below), whose sum is σ = 538994736. Its totient is φ = 149495808.

The previous prime is 328765133. The next prime is 328765249. The reversal of 328765138 is 831567823.

It can be written as a sum of positive squares in 8 ways, for example, as 1046529 + 327718609 = 1023^2 + 18103^2 .

It is a junction number, because it is equal to n+sod(n) for n = 328765094 and 328765103.

It is not an unprimeable number, because it can be changed into a prime (328765133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 931170 + ... + 931522.

Almost surely, 2^328765138 is an apocalyptic number.

328765138 is a deficient number, since it is larger than the sum of its proper divisors (210229598).

328765138 is a wasteful number, since it uses less digits than its factorization.

328765138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798.

The product of its digits is 241920, while the sum is 43.

The square root of 328765138 is about 18131.8818107774. The cubic root of 328765138 is about 690.1792840850.

The spelling of 328765138 in words is "three hundred twenty-eight million, seven hundred sixty-five thousand, one hundred thirty-eight".