328638507 has 8 divisors (see below), whose sum is σ = 438274560. Its totient is φ = 219047400.

The previous prime is 328638503. The next prime is 328638517. The reversal of 328638507 is 705836823.

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

It is not a de Polignac number, because 328638507 - 2² = 328638503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (328638503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13794 + ... + 29112.

It is an arithmetic number, because the mean of its divisors is an integer number (54784320).

Almost surely, 2^328638507 is an apocalyptic number.

328638507 is a deficient number, since it is larger than the sum of its proper divisors (109636053).

328638507 is a wasteful number, since it uses less digits than its factorization.

328638507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22473.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 328638507 is about 18128.3895313401. The cubic root of 328638507 is about 690.0906602152.

The spelling of 328638507 in words is "three hundred twenty-eight million, six hundred thirty-eight thousand, five hundred seven".