31472738 has 16 divisors (see below), whose sum is σ = 52228800. Its totient is φ = 14103600.

The previous prime is 31472723. The next prime is 31472773. The reversal of 31472738 is 83727413.

It is a junction number, because it is equal to n+sod(n) for n = 31472698 and 31472707.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8513 + ... + 11636.

It is an arithmetic number, because the mean of its divisors is an integer number (3264300).

Almost surely, 2^31472738 is an apocalyptic number.

31472738 is a deficient number, since it is larger than the sum of its proper divisors (20756062).

31472738 is a wasteful number, since it uses less digits than its factorization.

31472738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20233.

The product of its digits is 28224, while the sum is 35.

The square root of 31472738 is about 5610.0568624569. The cubic root of 31472738 is about 315.7268442766.

It can be divided in two parts, 3147 and 2738, that added together give a palindrome (5885).

The spelling of 31472738 in words is "thirty-one million, four hundred seventy-two thousand, seven hundred thirty-eight".