25305720 has 128 divisors (see below), whose sum is σ = 87264000. Its totient is φ = 5806080.

The previous prime is 25305697. The next prime is 25305757. The reversal of 25305720 is 2750352.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24576 + ... + 25584.

It is an arithmetic number, because the mean of its divisors is an integer number (681750).

Almost surely, 2^25305720 is an apocalyptic number.

25305720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25305720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43632000).

25305720 is an abundant number, since it is smaller than the sum of its proper divisors (61958280).

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

25305720 is a wasteful number, since it uses less digits than its factorization.

25305720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053 (or 1049 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 24.

The square root of 25305720 is about 5030.4791024315. The cubic root of 25305720 is about 293.5888556330.

The spelling of 25305720 in words is "twenty-five million, three hundred five thousand, seven hundred twenty".