31864668 has 48 divisors (see below), whose sum is σ = 81492096. Its totient is φ = 9610560.

The previous prime is 31864639. The next prime is 31864673. The reversal of 31864668 is 86646813.

It is a happy number.

Its product of digits (165888) is a multiple of the sum of its prime divisors (1152).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36930 + ... + 37782.

It is an arithmetic number, because the mean of its divisors is an integer number (1697752).

Almost surely, 2^31864668 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 31864668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40746048).

31864668 is an abundant number, since it is smaller than the sum of its proper divisors (49627428).

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

31864668 is a wasteful number, since it uses less digits than its factorization.

31864668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154 (or 1152 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 31864668 is about 5644.8798038577. The cubic root of 31864668 is about 317.0320234875.

The spelling of 31864668 in words is "thirty-one million, eight hundred sixty-four thousand, six hundred sixty-eight".