31049540 has 24 divisors (see below), whose sum is σ = 68040000. Its totient is φ = 11879648.

The previous prime is 31049537. The next prime is 31049567. The reversal of 31049540 is 4594013.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 33290 + ... + 34209.

It is an arithmetic number, because the mean of its divisors is an integer number (2835000).

Almost surely, 2^31049540 is an apocalyptic number.

It is an amenable number.

31049540 is an abundant number, since it is smaller than the sum of its proper divisors (36990460).

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

31049540 is a wasteful number, since it uses less digits than its factorization.

31049540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67531 (or 67529 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 31049540 is about 5572.2114102033. The cubic root of 31049540 is about 314.3053138112.

The spelling of 31049540 in words is "thirty-one million, forty-nine thousand, five hundred forty".