30984540 has 96 divisors (see below), whose sum is σ = 94457664. Its totient is φ = 7557120.

The previous prime is 30984539. The next prime is 30984581. The reversal of 30984540 is 4548903.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 37330 + ... + 38150.

It is an arithmetic number, because the mean of its divisors is an integer number (983934).

Almost surely, 2^30984540 is an apocalyptic number.

30984540 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 30984540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47228832).

30984540 is an abundant number, since it is smaller than the sum of its proper divisors (63473124).

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

30984540 is a wasteful number, since it uses less digits than its factorization.

30984540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887 (or 885 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 30984540 is about 5566.3758407064. The cubic root of 30984540 is about 314.0858353246.

The spelling of 30984540 in words is "thirty million, nine hundred eighty-four thousand, five hundred forty".