25816280 has 64 divisors (see below), whose sum is σ = 66968640. Its totient is φ = 8773632.

The previous prime is 25816277. The next prime is 25816283. The reversal of 25816280 is 8261852.

It is an interprime number because it is at equal distance from previous prime (25816277) and next prime (25816283).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25816283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38024 + ... + 38696.

It is an arithmetic number, because the mean of its divisors is an integer number (1046385).

Almost surely, 2^25816280 is an apocalyptic number.

25816280 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 25816280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33484320).

25816280 is an abundant number, since it is smaller than the sum of its proper divisors (41152360).

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

25816280 is a wasteful number, since it uses less digits than its factorization.

25816280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828 (or 824 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 25816280 is about 5080.9723478878. The cubic root of 25816280 is about 295.5501750475.

The spelling of 25816280 in words is "twenty-five million, eight hundred sixteen thousand, two hundred eighty".