31340436 has 12 divisors (see below), whose sum is σ = 73127712. Its totient is φ = 10446808.

The previous prime is 31340423. The next prime is 31340447. The reversal of 31340436 is 63404313.

It is a tau number, because it is divible by the number of its divisors (12).

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, 1305840 + ... + 1305863.

It is an arithmetic number, because the mean of its divisors is an integer number (6093976).

Almost surely, 2^31340436 is an apocalyptic number.

It is an amenable number.

31340436 is an abundant number, since it is smaller than the sum of its proper divisors (41787276).

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

31340436 is a wasteful number, since it uses less digits than its factorization.

31340436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2611710 (or 2611708 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 31340436 is about 5598.2529417667. The cubic root of 31340436 is about 315.2838157591.

Adding to 31340436 its reverse (63404313), we get a palindrome (94744749).

The spelling of 31340436 in words is "thirty-one million, three hundred forty thousand, four hundred thirty-six".