328229691 has 4 divisors (see below), whose sum is σ = 437639592. Its totient is φ = 218819792.

The previous prime is 328229653. The next prime is 328229749. The reversal of 328229691 is 196922823.

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 328229691 - 2¹⁴ = 328213307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (328229491) 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, 54704946 + ... + 54704951.

It is an arithmetic number, because the mean of its divisors is an integer number (109409898).

Almost surely, 2^328229691 is an apocalyptic number.

328229691 is a deficient number, since it is larger than the sum of its proper divisors (109409901).

328229691 is a wasteful number, since it uses less digits than its factorization.

328229691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109409900.

The product of its digits is 93312, while the sum is 42.

The square root of 328229691 is about 18117.1104484131. The cubic root of 328229691 is about 689.8043910967.

The spelling of 328229691 in words is "three hundred twenty-eight million, two hundred twenty-nine thousand, six hundred ninety-one".