30887021 has 8 divisors (see below), whose sum is σ = 33737088. Its totient is φ = 28044000.

The previous prime is 30886993. The next prime is 30887053. The reversal of 30887021 is 12078803.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30887021 - 2¹⁸ = 30624877 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30887071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12401 + ... + 14681.

It is an arithmetic number, because the mean of its divisors is an integer number (4217136).

Almost surely, 2^30887021 is an apocalyptic number.

It is an amenable number.

30887021 is a deficient number, since it is larger than the sum of its proper divisors (2850067).

30887021 is a wasteful number, since it uses less digits than its factorization.

30887021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3523.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 30887021 is about 5557.6092881742. The cubic root of 30887021 is about 313.7559769870.

The spelling of 30887021 in words is "thirty million, eight hundred eighty-seven thousand, twenty-one".