31540960 has 48 divisors (see below), whose sum is σ = 81294192. Its totient is φ = 11468800.

The previous prime is 31540939. The next prime is 31540961. The reversal of 31540960 is 6904513.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31540961) 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, 7201 + ... + 10720.

It is an arithmetic number, because the mean of its divisors is an integer number (1693629).

Almost surely, 2^31540960 is an apocalyptic number.

It is an amenable number.

31540960 is an abundant number, since it is smaller than the sum of its proper divisors (49753232).

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

31540960 is a wasteful number, since it uses less digits than its factorization.

31540960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17947 (or 17939 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 31540960 is about 5616.1339015376. The cubic root of 31540960 is about 315.9548084709.

The spelling of 31540960 in words is "thirty-one million, five hundred forty thousand, nine hundred sixty".