31340416 has 32 divisors (see below), whose sum is σ = 64596600. Its totient is φ = 15128064.

The previous prime is 31340381. The next prime is 31340417. The reversal of 31340416 is 61404313.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-3 number, since 3×31340416³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31340417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510 + ... + 7933.

Almost surely, 2^31340416 is an apocalyptic number.

It is an amenable number.

31340416 is an abundant number, since it is smaller than the sum of its proper divisors (33256184).

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

31340416 is an equidigital number, since it uses as much as digits as its factorization.

31340416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8486 (or 8474 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 31340416 is about 5598.2511554949. The cubic root of 31340416 is about 315.2837486926.

Adding to 31340416 its reverse (61404313), we get a palindrome (92744729).

The spelling of 31340416 in words is "thirty-one million, three hundred forty thousand, four hundred sixteen".