31383666 has 48 divisors (see below), whose sum is σ = 74122080. Its totient is φ = 9840960.

The previous prime is 31383647. The next prime is 31383701. The reversal of 31383666 is 66638313.

It is a zygodrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 31383666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14601 + ... + 16611.

It is an arithmetic number, because the mean of its divisors is an integer number (1544210).

Almost surely, 2^31383666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31383666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37061040).

31383666 is an abundant number, since it is smaller than the sum of its proper divisors (42738414).

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

31383666 is a wasteful number, since it uses less digits than its factorization.

31383666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056 (or 2033 counting only the distinct ones).

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

The square root of 31383666 is about 5602.1126372111. The cubic root of 31383666 is about 315.4287133109.

The spelling of 31383666 in words is "thirty-one million, three hundred eighty-three thousand, six hundred sixty-six".