31329108 has 18 divisors (see below), whose sum is σ = 79193114. Its totient is φ = 10443024.

The previous prime is 31329101. The next prime is 31329139. The reversal of 31329108 is 80192313.

It can be written as a sum of positive squares in only one way, i.e., 27688644 + 3640464 = 5262^2 + 1908^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31329101) 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 5 ways as a sum of consecutive naturals, for example, 435091 + ... + 435162.

Almost surely, 2^31329108 is an apocalyptic number.

It is an amenable number.

31329108 is an abundant number, since it is smaller than the sum of its proper divisors (47864006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31329108 is a wasteful number, since it uses less digits than its factorization.

31329108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870263 (or 870258 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 31329108 is about 5597.2411061165. The cubic root of 31329108 is about 315.2458247383.

The spelling of 31329108 in words is "thirty-one million, three hundred twenty-nine thousand, one hundred eight".