30219904 has 96 divisors (see below), whose sum is σ = 71677440. Its totient is φ = 12579840.

The previous prime is 30219901. The next prime is 30219913. The reversal of 30219904 is 40991203.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (30219901) 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 11 ways as a sum of consecutive naturals, for example, 237889 + ... + 238015.

It is an arithmetic number, because the mean of its divisors is an integer number (746640).

Almost surely, 2^30219904 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 30219904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35838720).

30219904 is an abundant number, since it is smaller than the sum of its proper divisors (41457536).

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

30219904 is a wasteful number, since it uses less digits than its factorization.

30219904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 30219904 is about 5497.2633191434. The cubic root of 30219904 is about 311.4806173512.

The spelling of 30219904 in words is "thirty million, two hundred nineteen thousand, nine hundred four".