328430631 has 4 divisors (see below), whose sum is σ = 437907512. Its totient is φ = 218953752.

The previous prime is 328430581. The next prime is 328430653. The reversal of 328430631 is 136034823.

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

It is not a de Polignac number, because 328430631 - 2⁶ = 328430567 is a prime.

It is a super-2 number, since 2×328430631² = 215733358758116322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328430831) 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, 54738436 + ... + 54738441.

It is an arithmetic number, because the mean of its divisors is an integer number (109476878).

Almost surely, 2^328430631 is an apocalyptic number.

328430631 is a deficient number, since it is larger than the sum of its proper divisors (109476881).

328430631 is a wasteful number, since it uses less digits than its factorization.

328430631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109476880.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 328430631 is about 18122.6551862579. The cubic root of 328430631 is about 689.9451269112.

The spelling of 328430631 in words is "three hundred twenty-eight million, four hundred thirty thousand, six hundred thirty-one".