25266320 has 20 divisors (see below), whose sum is σ = 58744380. Its totient is φ = 10106496.

The previous prime is 25266313. The next prime is 25266331. The reversal of 25266320 is 2366252.

It can be written as a sum of positive squares in 2 ways, for example, as 3625216 + 21641104 = 1904^2 + 4652^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 25266320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157835 + ... + 157994.

It is an arithmetic number, because the mean of its divisors is an integer number (2937219).

Almost surely, 2^25266320 is an apocalyptic number.

25266320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25266320 is an abundant number, since it is smaller than the sum of its proper divisors (33478060).

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

25266320 is a wasteful number, since it uses less digits than its factorization.

25266320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315842 (or 315836 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 25266320 is about 5026.5614489430. The cubic root of 25266320 is about 293.4364077617.

The spelling of 25266320 in words is "twenty-five million, two hundred sixty-six thousand, three hundred twenty".