31942386 has 48 divisors (see below), whose sum is σ = 80121600. Its totient is φ = 9008064.

The previous prime is 31942373. The next prime is 31942387. The reversal of 31942386 is 68324913.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31942386.

It is not an unprimeable number, because it can be changed into a prime (31942387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8350 + ... + 11558.

It is an arithmetic number, because the mean of its divisors is an integer number (1669200).

Almost surely, 2^31942386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31942386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40060800).

31942386 is an abundant number, since it is smaller than the sum of its proper divisors (48179214).

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

31942386 is a wasteful number, since it uses less digits than its factorization.

31942386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3303 (or 3300 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 31942386 is about 5651.7595490254. The cubic root of 31942386 is about 317.2895615053.

The spelling of 31942386 in words is "thirty-one million, nine hundred forty-two thousand, three hundred eighty-six".