31612040 has 32 divisors (see below), whose sum is σ = 72135360. Its totient is φ = 12465600.

The previous prime is 31612013. The next prime is 31612043. The reversal of 31612040 is 4021613.

It is not an unprimeable number, because it can be changed into a prime (31612043) by changing a digit.

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, 2726 + ... + 8405.

It is an arithmetic number, because the mean of its divisors is an integer number (2254230).

Almost surely, 2^31612040 is an apocalyptic number.

It is an amenable number.

31612040 is an abundant number, since it is smaller than the sum of its proper divisors (40523320).

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

31612040 is a wasteful number, since it uses less digits than its factorization.

31612040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11213 (or 11209 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 31612040 is about 5622.4585369747. The cubic root of 31612040 is about 316.1919732935.

Adding to 31612040 its reverse (4021613), we get a palindrome (35633653).

The spelling of 31612040 in words is "thirty-one million, six hundred twelve thousand, forty".