328724631 has 12 divisors (see below), whose sum is σ = 502755552. Its totient is φ = 206258496.

The previous prime is 328724629. The next prime is 328724633. The reversal of 328724631 is 136427823.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (328724629) and next prime (328724633).

It is not a de Polignac number, because 328724631 - 2¹ = 328724629 is a prime.

It is a super-2 number, since 2×328724631² = 216119766052172322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328724633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1074111 + ... + 1074416.

It is an arithmetic number, because the mean of its divisors is an integer number (41896296).

Almost surely, 2^328724631 is an apocalyptic number.

328724631 is a deficient number, since it is larger than the sum of its proper divisors (174030921).

328724631 is a wasteful number, since it uses less digits than its factorization.

328724631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2148550 (or 2148547 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 328724631 is about 18130.7647659993. The cubic root of 328724631 is about 690.1509373644.

The spelling of 328724631 in words is "three hundred twenty-eight million, seven hundred twenty-four thousand, six hundred thirty-one".