31034540 has 24 divisors (see below), whose sum is σ = 66763872. Its totient is φ = 12110720.

The previous prime is 31034491. The next prime is 31034551. The reversal of 31034540 is 4543013.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 18104 + ... + 19743.

It is an arithmetic number, because the mean of its divisors is an integer number (2781828).

Almost surely, 2^31034540 is an apocalyptic number.

It is an amenable number.

31034540 is an abundant number, since it is smaller than the sum of its proper divisors (35729332).

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

31034540 is a wasteful number, since it uses less digits than its factorization.

31034540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37897 (or 37895 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 31034540 is about 5570.8652828802. The cubic root of 31034540 is about 314.2546921367.

Adding to 31034540 its reverse (4543013), we get a palindrome (35577553).

The spelling of 31034540 in words is "thirty-one million, thirty-four thousand, five hundred forty".