25563930 has 128 divisors (see below), whose sum is σ = 76032000. Its totient is φ = 5370624.

The previous prime is 25563919. The next prime is 25563931. The reversal of 25563930 is 3936552.

It is a junction number, because it is equal to n+sod(n) for n = 25563891 and 25563900.

It is not an unprimeable number, because it can be changed into a prime (25563931) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 171496 + ... + 171644.

It is an arithmetic number, because the mean of its divisors is an integer number (594000).

Almost surely, 2^25563930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25563930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38016000).

25563930 is an abundant number, since it is smaller than the sum of its proper divisors (50468070).

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

25563930 is a wasteful number, since it uses less digits than its factorization.

25563930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228.

The product of its (nonzero) digits is 24300, while the sum is 33.

The square root of 25563930 is about 5056.0785199599. The cubic root of 25563930 is about 294.5840350213.

The spelling of 25563930 in words is "twenty-five million, five hundred sixty-three thousand, nine hundred thirty".