31406 has 8 divisors (see below), whose sum is σ = 48384. Its totient is φ = 15280.

The previous prime is 31397. The next prime is 31469. The reversal of 31406 is 60413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 13 and base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 31406.

It is an unprimeable number.

31406 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110 + ... + 273.

It is an arithmetic number, because the mean of its divisors is an integer number (6048).

2³¹⁴⁰⁶ is an apocalyptic number.

31406 is a deficient number, since it is larger than the sum of its proper divisors (16978).

31406 is a wasteful number, since it uses less digits than its factorization.

31406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 31406 is about 177.2173806375. The cubic root of 31406 is about 31.5503519894.

Adding to 31406 its reverse (60413), we get a palindrome (91819).

The spelling of 31406 in words is "thirty-one thousand, four hundred six".