30887868 has 48 divisors (see below), whose sum is σ = 79067520. Its totient is φ = 9307200.

The previous prime is 30887851. The next prime is 30887881. The reversal of 30887868 is 86878803.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 27298 + ... + 28406.

It is an arithmetic number, because the mean of its divisors is an integer number (1647240).

Almost surely, 2^30887868 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 30887868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39533760).

30887868 is an abundant number, since it is smaller than the sum of its proper divisors (48179652).

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

30887868 is a wasteful number, since it uses less digits than its factorization.

30887868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338 (or 1336 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 48.

The square root of 30887868 is about 5557.6854894821. The cubic root of 30887868 is about 313.7588449542.

The spelling of 30887868 in words is "thirty million, eight hundred eighty-seven thousand, eight hundred sixty-eight".