30199890 has 64 divisors (see below), whose sum is σ = 85524480. Its totient is φ = 6678720.

The previous prime is 30199879. The next prime is 30199891. The reversal of 30199890 is 9899103.

It is not an unprimeable number, because it can be changed into a prime (30199891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4191 + ... + 8829.

It is an arithmetic number, because the mean of its divisors is an integer number (1336320).

Almost surely, 2^30199890 is an apocalyptic number.

30199890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30199890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42762240).

30199890 is an abundant number, since it is smaller than the sum of its proper divisors (55324590).

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

30199890 is a wasteful number, since it uses less digits than its factorization.

30199890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4687.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 30199890 is about 5495.4426573298. The cubic root of 30199890 is about 311.4118398352.

The spelling of 30199890 in words is "thirty million, one hundred ninety-nine thousand, eight hundred ninety".