30349998 has 64 divisors (see below), whose sum is σ = 81630720. Its totient is φ = 8159616.

The previous prime is 30349993. The next prime is 30350051. The reversal of 30349998 is 89994303.

It is a super-2 number, since 2×30349998² = 1842244757200008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30349993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4065 + ... + 8787.

It is an arithmetic number, because the mean of its divisors is an integer number (1275480).

Almost surely, 2^30349998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30349998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40815360).

30349998 is an abundant number, since it is smaller than the sum of its proper divisors (51280722).

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

30349998 is a wasteful number, since it uses less digits than its factorization.

30349998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4758 (or 4752 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 30349998 is about 5509.0832268173. The cubic root of 30349998 is about 311.9269429537.

The spelling of 30349998 in words is "thirty million, three hundred forty-nine thousand, nine hundred ninety-eight".