328646651 has 4 divisors (see below), whose sum is σ = 332339400. Its totient is φ = 324953904.

The previous prime is 328646621. The next prime is 328646653. The reversal of 328646651 is 156646823.

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

It is a cyclic number.

It is not a de Polignac number, because 328646651 - 2²² = 324452347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 328646599 and 328646608.

It is not an unprimeable number, because it can be changed into a prime (328646653) 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, 1846241 + ... + 1846418.

It is an arithmetic number, because the mean of its divisors is an integer number (83084850).

Almost surely, 2^328646651 is an apocalyptic number.

328646651 is a deficient number, since it is larger than the sum of its proper divisors (3692749).

328646651 is an equidigital number, since it uses as much as digits as its factorization.

328646651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3692748.

The product of its digits is 207360, while the sum is 41.

The square root of 328646651 is about 18128.6141500116. The cubic root of 328646651 is about 690.0963605534.

The spelling of 328646651 in words is "three hundred twenty-eight million, six hundred forty-six thousand, six hundred fifty-one".