30999132 has 96 divisors (see below), whose sum is σ = 85155840. Its totient is φ = 9737280.

The previous prime is 30999121. The next prime is 30999139. The reversal of 30999132 is 23199903.

It is a super-3 number, since 3×30999132³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30999139) 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 31 ways as a sum of consecutive naturals, for example, 157258 + ... + 157454.

It is an arithmetic number, because the mean of its divisors is an integer number (887040).

Almost surely, 2^30999132 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 30999132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42577920).

30999132 is an abundant number, since it is smaller than the sum of its proper divisors (54156708).

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

30999132 is a wasteful number, since it uses less digits than its factorization.

30999132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 36.

The square root of 30999132 is about 5567.6864135833. The cubic root of 30999132 is about 314.1351332565.

The spelling of 30999132 in words is "thirty million, nine hundred ninety-nine thousand, one hundred thirty-two".