30440425 has 6 divisors (see below), whose sum is σ = 37746158. Its totient is φ = 24352320.

The previous prime is 30440393. The next prime is 30440429. The reversal of 30440425 is 52404403.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3136 + 30437289 = 56^2 + 5517^2 .

It is not a de Polignac number, because 30440425 - 2⁵ = 30440393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30440396 and 30440405.

It is not an unprimeable number, because it can be changed into a prime (30440429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 608784 + ... + 608833.

Almost surely, 2^30440425 is an apocalyptic number.

It is an amenable number.

30440425 is a deficient number, since it is larger than the sum of its proper divisors (7305733).

30440425 is a wasteful number, since it uses less digits than its factorization.

30440425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217627 (or 1217622 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 30440425 is about 5517.2842051140. The cubic root of 30440425 is about 312.2364284252.

Adding to 30440425 its reverse (52404403), we get a palindrome (82844828).

The spelling of 30440425 in words is "thirty million, four hundred forty thousand, four hundred twenty-five".