328252139 has 4 divisors (see below), whose sum is σ = 331320024. Its totient is φ = 325184256.

The previous prime is 328252097. The next prime is 328252157. The reversal of 328252139 is 931252823.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328252139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 328252099 and 328252108.

It is not an unprimeable number, because it can be changed into a prime (328252339) 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, 1533782 + ... + 1533995.

It is an arithmetic number, because the mean of its divisors is an integer number (82830006).

Almost surely, 2^328252139 is an apocalyptic number.

328252139 is a deficient number, since it is larger than the sum of its proper divisors (3067885).

328252139 is a wasteful number, since it uses less digits than its factorization.

328252139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3067884.

The product of its digits is 25920, while the sum is 35.

The square root of 328252139 is about 18117.7299626636. The cubic root of 328252139 is about 689.8201162392.

The spelling of 328252139 in words is "three hundred twenty-eight million, two hundred fifty-two thousand, one hundred thirty-nine".