30987852 has 72 divisors (see below), whose sum is σ = 84935424. Its totient is φ = 8613408.

The previous prime is 30987851. The next prime is 30987871. The reversal of 30987852 is 25878903.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (30987851) 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 23 ways as a sum of consecutive naturals, for example, 185473 + ... + 185639.

Almost surely, 2^30987852 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 30987852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42467712).

30987852 is an abundant number, since it is smaller than the sum of its proper divisors (53947572).

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

30987852 is a wasteful number, since it uses less digits than its factorization.

30987852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 30987852 is about 5566.6733333293. The cubic root of 30987852 is about 314.0970260154.

The spelling of 30987852 in words is "thirty million, nine hundred eighty-seven thousand, eight hundred fifty-two".