31896704 has 64 divisors (see below), whose sum is σ = 73570560. Its totient is φ = 13492224.

The previous prime is 31896703. The next prime is 31896707. The reversal of 31896704 is 40769813.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (31896703) 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 7 ways as a sum of consecutive naturals, for example, 86729 + ... + 87095.

It is an arithmetic number, because the mean of its divisors is an integer number (1149540).

Almost surely, 2^31896704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31896704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36785280).

31896704 is an abundant number, since it is smaller than the sum of its proper divisors (41673856).

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

31896704 is an equidigital number, since it uses as much as digits as its factorization.

31896704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 31896704 is about 5647.7167067763. The cubic root of 31896704 is about 317.1382334557.

The spelling of 31896704 in words is "thirty-one million, eight hundred ninety-six thousand, seven hundred four".