31286426 has 24 divisors (see below), whose sum is σ = 52463700. Its totient is φ = 13942656.

The previous prime is 31286401. The next prime is 31286429. The reversal of 31286426 is 62468213.

It can be written as a sum of positive squares in 2 ways, for example, as 26512201 + 4774225 = 5149^2 + 2185^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31286392 and 31286401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31286429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11000 + ... + 13548.

Almost surely, 2^31286426 is an apocalyptic number.

31286426 is a deficient number, since it is larger than the sum of its proper divisors (21177274).

31286426 is a wasteful number, since it uses less digits than its factorization.

31286426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2606 (or 2587 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 31286426 is about 5593.4270353693. The cubic root of 31286426 is about 315.1025986441.

The spelling of 31286426 in words is "thirty-one million, two hundred eighty-six thousand, four hundred twenty-six".