25816320 has 216 divisors, whose sum is σ = 93746016. Its totient is φ = 6801408.

The previous prime is 25816309. The next prime is 25816321. The reversal of 25816320 is 2361852.

25816320 is a `hidden beast` number, since 2 + 581 + 63 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (216).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25816321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 310999 + ... + 311081.

Almost surely, 2^25816320 is an apocalyptic number.

25816320 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 25816320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46873008).

25816320 is an abundant number, since it is smaller than the sum of its proper divisors (67929696).

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

25816320 is an frugal number, since it uses more digits than its factorization.

25816320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 25816320 is about 5080.9762841407. The cubic root of 25816320 is about 295.5503276902.

The spelling of 25816320 in words is "twenty-five million, eight hundred sixteen thousand, three hundred twenty".