25328720 has 80 divisors (see below), whose sum is σ = 62198400. Its totient is φ = 9580032.

The previous prime is 25328717. The next prime is 25328749. The reversal of 25328720 is 2782352.

25328720 = T₁₀₅ + T₁₀₆ + ... + T₅₃₄.

It is a tau number, because it is divible by the number of its divisors (80).

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, 127181 + ... + 127379.

It is an arithmetic number, because the mean of its divisors is an integer number (777480).

Almost surely, 2^25328720 is an apocalyptic number.

25328720 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 25328720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31099200).

25328720 is an abundant number, since it is smaller than the sum of its proper divisors (36869680).

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

25328720 is a wasteful number, since it uses less digits than its factorization.

25328720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 25328720 is about 5032.7646477855. The cubic root of 25328720 is about 293.6777749096.

The spelling of 25328720 in words is "twenty-five million, three hundred twenty-eight thousand, seven hundred twenty".