30031040 has 56 divisors (see below), whose sum is σ = 77022960. Its totient is φ = 11086848.

The previous prime is 30031021. The next prime is 30031049. The reversal of 30031040 is 4013003.

It is not an unprimeable number, because it can be changed into a prime (30031049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551 + ... + 7769.

It is an arithmetic number, because the mean of its divisors is an integer number (1375410).

Almost surely, 2^30031040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30031040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38511480).

30031040 is an abundant number, since it is smaller than the sum of its proper divisors (46991920).

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

30031040 is a wasteful number, since it uses less digits than its factorization.

30031040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7249 (or 7239 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 30031040 is about 5480.0583938495. The cubic root of 30031040 is about 310.8303786532.

Adding to 30031040 its reverse (4013003), we get a palindrome (34044043).

The spelling of 30031040 in words is "thirty million, thirty-one thousand, forty".