30005998 has 8 divisors (see below), whose sum is σ = 49100760. Its totient is φ = 13639080.

The previous prime is 30005977. The next prime is 30006013. The reversal of 30005998 is 89950003.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681933 + ... + 681976.

It is an arithmetic number, because the mean of its divisors is an integer number (6137595).

Almost surely, 2^30005998 is an apocalyptic number.

30005998 is a deficient number, since it is larger than the sum of its proper divisors (19094762).

30005998 is a wasteful number, since it uses less digits than its factorization.

30005998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363922.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 30005998 is about 5477.7730876698. The cubic root of 30005998 is about 310.7439571939.

It can be divided in two parts, 3000 and 5998, that added together give a palindrome (8998).

The spelling of 30005998 in words is "thirty million, five thousand, nine hundred ninety-eight".