31830480 has 120 divisors (see below), whose sum is σ = 116644320. Its totient is φ = 7714560.

The previous prime is 31830457. The next prime is 31830481. The reversal of 31830480 is 8403813.

31830480 is a `hidden beast` number, since 3 + 183 + 0 + 480 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31830481) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 5911 + ... + 9929.

It is an arithmetic number, because the mean of its divisors is an integer number (972036).

Almost surely, 2^31830480 is an apocalyptic number.

31830480 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31830480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58322160).

31830480 is an abundant number, since it is smaller than the sum of its proper divisors (84813840).

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

31830480 is a wasteful number, since it uses less digits than its factorization.

31830480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4049 (or 4040 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 31830480 is about 5641.8507601673. The cubic root of 31830480 is about 316.9186003752.

The spelling of 31830480 in words is "thirty-one million, eight hundred thirty thousand, four hundred eighty".