31342040 has 64 divisors (see below), whose sum is σ = 74844000. Its totient is φ = 11791360.

The previous prime is 31342037. The next prime is 31342043. The reversal of 31342040 is 4024313.

It is an interprime number because it is at equal distance from previous prime (31342037) and next prime (31342043).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31342043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47231 + ... + 47889.

Almost surely, 2^31342040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31342040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37422000).

31342040 is an abundant number, since it is smaller than the sum of its proper divisors (43501960).

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

31342040 is a wasteful number, since it uses less digits than its factorization.

31342040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740 (or 736 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 31342040 is about 5598.3961989127. The cubic root of 31342040 is about 315.2891943974.

Adding to 31342040 its reverse (4024313), we get a palindrome (35366353).

The spelling of 31342040 in words is "thirty-one million, three hundred forty-two thousand, forty".