30331900 has 72 divisors (see below), whose sum is σ = 68901840. Its totient is φ = 11581440.

The previous prime is 30331877. The next prime is 30331901. The reversal of 30331900 is 913303.

It is a happy number.

It is a super-2 number, since 2×30331900² = 1840048315220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30331901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 312652 + ... + 312748.

It is an arithmetic number, because the mean of its divisors is an integer number (956970).

Almost surely, 2^30331900 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 30331900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34450920).

30331900 is an abundant number, since it is smaller than the sum of its proper divisors (38569940).

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

30331900 is a wasteful number, since it uses less digits than its factorization.

30331900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 243, while the sum is 19.

The square root of 30331900 is about 5507.4404218294. The cubic root of 30331900 is about 311.8649289321.

The spelling of 30331900 in words is "thirty million, three hundred thirty-one thousand, nine hundred".