30390625 has 16 divisors (see below), whose sum is σ = 38085840. Its totient is φ = 24250000.

The previous prime is 30390539. The next prime is 30390629. The reversal of 30390625 is 52609303.

It can be written as a sum of positive squares in 8 ways, for example, as 19678096 + 10712529 = 4436^2 + 3273^2 .

It is not a de Polignac number, because 30390625 - 2⁷ = 30390497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30390593 and 30390602.

It is not an unprimeable number, because it can be changed into a prime (30390629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77931 + ... + 78319.

It is an arithmetic number, because the mean of its divisors is an integer number (2380365).

Almost surely, 2^30390625 is an apocalyptic number.

It is an amenable number.

30390625 is a deficient number, since it is larger than the sum of its proper divisors (7695215).

30390625 is an frugal number, since it uses more digits than its factorization.

30390625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 28.

The square root of 30390625 is about 5512.7692678000. The cubic root of 30390625 is about 312.0660643852.

Adding to 30390625 its reverse (52609303), we get a palindrome (82999928).

The spelling of 30390625 in words is "thirty million, three hundred ninety thousand, six hundred twenty-five".