31305484 has 24 divisors (see below), whose sum is σ = 65334528. Its totient is φ = 12833040.

The previous prime is 31305479. The next prime is 31305487. The reversal of 31305484 is 48450313.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (31305487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23662 + ... + 24949.

It is an arithmetic number, because the mean of its divisors is an integer number (2722272).

Almost surely, 2^31305484 is an apocalyptic number.

It is an amenable number.

31305484 is an abundant number, since it is smaller than the sum of its proper divisors (34029044).

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

31305484 is a wasteful number, since it uses less digits than its factorization.

31305484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48645 (or 48643 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 31305484 is about 5595.1303827525. The cubic root of 31305484 is about 315.1665668156.

Adding to 31305484 its reverse (48450313), we get a palindrome (79755797).

The spelling of 31305484 in words is "thirty-one million, three hundred five thousand, four hundred eighty-four".