31696434 has 144 divisors (see below), whose sum is σ = 91125216. Its totient is φ = 8232840.

The previous prime is 31696363. The next prime is 31696439. The reversal of 31696434 is 43469613.

31696434 is a `hidden beast` number, since 3 + 1 + 6 + 9 + 643 + 4 = 666.

Its product of digits (46656) is a multiple of the sum of its prime factors (64).

It is not an unprimeable number, because it can be changed into a prime (31696439) 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 71 ways as a sum of consecutive naturals, for example, 2881489 + ... + 2881499.

It is an arithmetic number, because the mean of its divisors is an integer number (632814).

Almost surely, 2^31696434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31696434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45562608).

31696434 is an abundant number, since it is smaller than the sum of its proper divisors (59428782).

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

31696434 is an equidigital number, since it uses as much as digits as its factorization.

31696434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64 (or 23 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 31696434 is about 5629.9586144127. The cubic root of 31696434 is about 316.4731002946.

The spelling of 31696434 in words is "thirty-one million, six hundred ninety-six thousand, four hundred thirty-four".