30031020 has 96 divisors (see below), whose sum is σ = 98380800. Its totient is φ = 7584192.

The previous prime is 30030991. The next prime is 30031021. The reversal of 30031020 is 2013003.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 30030993 and 30031011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30031021) 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 31 ways as a sum of consecutive naturals, for example, 8797 + ... + 11723.

It is an arithmetic number, because the mean of its divisors is an integer number (1024800).

Almost surely, 2^30031020 is an apocalyptic number.

30031020 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 30031020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49190400).

30031020 is an abundant number, since it is smaller than the sum of its proper divisors (68349780).

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

30031020 is a wasteful number, since it uses less digits than its factorization.

30031020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2964 (or 2956 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 9.

The square root of 30031020 is about 5480.0565690511. The cubic root of 30031020 is about 310.8303096512.

Adding to 30031020 its reverse (2013003), we get a palindrome (32044023).

The spelling of 30031020 in words is "thirty million, thirty-one thousand, twenty".