30398225 has 36 divisors (see below), whose sum is σ = 44676828. Its totient is φ = 20380800.

The previous prime is 30398209. The next prime is 30398231. The reversal of 30398225 is 52289303.

30398225 = T₁₄₁ + T₁₄₂ + ... + T₅₆₉.

It can be written as a sum of positive squares in 6 ways, for example, as 9759376 + 20638849 = 3124^2 + 4543^2 .

It is not a de Polignac number, because 30398225 - 2⁴ = 30398209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30398191 and 30398200.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 38939 + ... + 39711.

It is an arithmetic number, because the mean of its divisors is an integer number (1241023).

Almost surely, 2^30398225 is an apocalyptic number.

It is an amenable number.

30398225 is a deficient number, since it is larger than the sum of its proper divisors (14278603).

30398225 is a wasteful number, since it uses less digits than its factorization.

30398225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818 (or 802 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 30398225 is about 5513.4585334434. The cubic root of 30398225 is about 312.0920757447.

The spelling of 30398225 in words is "thirty million, three hundred ninety-eight thousand, two hundred twenty-five".