30831030 has 80 divisors (see below), whose sum is σ = 87816960. Its totient is φ = 7734528.

The previous prime is 30831011. The next prime is 30831037. The reversal of 30831030 is 3013803.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30830994 and 30831012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30831037) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12651 + ... + 14889.

It is an arithmetic number, because the mean of its divisors is an integer number (1097712).

Almost surely, 2^30831030 is an apocalyptic number.

30831030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30831030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43908480).

30831030 is an abundant number, since it is smaller than the sum of its proper divisors (56985930).

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

30831030 is a wasteful number, since it uses less digits than its factorization.

30831030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2275 (or 2266 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 30831030 is about 5552.5696753845. The cubic root of 30831030 is about 313.5662733908.

Adding to 30831030 its reverse (3013803), we get a palindrome (33844833).

The spelling of 30831030 in words is "thirty million, eight hundred thirty-one thousand, thirty".