25305630 has 32 divisors (see below), whose sum is σ = 69410304. Its totient is φ = 5784096.

The previous prime is 25305619. The next prime is 25305647. The reversal of 25305630 is 3650352.

It is a self number, because there is not a number n which added to its sum of digits gives 25305630.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60042 + ... + 60461.

It is an arithmetic number, because the mean of its divisors is an integer number (2169072).

Almost surely, 2^25305630 is an apocalyptic number.

25305630 is an abundant number, since it is smaller than the sum of its proper divisors (44104674).

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

25305630 is a wasteful number, since it uses less digits than its factorization.

25305630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120520.

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 25305630 is about 5030.4701569535. The cubic root of 25305630 is about 293.5885075822.

Adding to 25305630 its reverse (3650352), we get a palindrome (28955982).

The spelling of 25305630 in words is "twenty-five million, three hundred five thousand, six hundred thirty".