31438 has 8 divisors (see below), whose sum is σ = 51480. Its totient is φ = 14280.

The previous prime is 31397. The next prime is 31469. The reversal of 31438 is 83413.

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

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693 + ... + 736.

It is an arithmetic number, because the mean of its divisors is an integer number (6435).

2³¹⁴³⁸ is an apocalyptic number.

31438 is a deficient number, since it is larger than the sum of its proper divisors (20042).

31438 is a wasteful number, since it uses less digits than its factorization.

31438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442.

The product of its digits is 288, while the sum is 19.

The square root of 31438 is about 177.3076422493. The cubic root of 31438 is about 31.5610640460.

It can be divided in two parts, 3 and 1438, that added together give a palindrome (1441).

The spelling of 31438 in words is "thirty-one thousand, four hundred thirty-eight".