31996608 has 168 divisors, whose sum is σ = 104241600. Its totient is φ = 8612352.

The previous prime is 31996607. The next prime is 31996609. The reversal of 31996608 is 80669913.

It is an interprime number because it is at equal distance from previous prime (31996607) and next prime (31996609).

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 31996608.

It is not an unprimeable number, because it can be changed into a prime (31996607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178663 + ... + 178841.

Almost surely, 2^31996608 is an apocalyptic number.

31996608 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31996608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52120800).

31996608 is an abundant number, since it is smaller than the sum of its proper divisors (72244992).

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

31996608 is a wasteful number, since it uses less digits than its factorization.

31996608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 31996608 is about 5656.5544282717. The cubic root of 31996608 is about 317.4689923632.

The spelling of 31996608 in words is "thirty-one million, nine hundred ninety-six thousand, six hundred eight".