30890025 has 24 divisors (see below), whose sum is σ = 56747360. Its totient is φ = 16474320.

The previous prime is 30890021. The next prime is 30890053. The reversal of 30890025 is 52009803.

It is not a de Polignac number, because 30890025 - 2² = 30890021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30890021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22207 + ... + 23556.

Almost surely, 2^30890025 is an apocalyptic number.

It is an amenable number.

30890025 is a deficient number, since it is larger than the sum of its proper divisors (25857335).

30890025 is a wasteful number, since it uses less digits than its factorization.

30890025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45782 (or 45771 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 30890025 is about 5557.8795416957. The cubic root of 30890025 is about 313.7661483834.

Adding to 30890025 its reverse (52009803), we get a palindrome (82899828).

The spelling of 30890025 in words is "thirty million, eight hundred ninety thousand, twenty-five".