25305380 has 24 divisors (see below), whose sum is σ = 54146232. Its totient is φ = 9930752.

The previous prime is 25305361. The next prime is 25305383. The reversal of 25305380 is 8350352.

It can be written as a sum of positive squares in 4 ways, for example, as 1236544 + 24068836 = 1112^2 + 4906^2 .

It is not an unprimeable number, because it can be changed into a prime (25305383) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10877 + ... + 12996.

It is an arithmetic number, because the mean of its divisors is an integer number (2256093).

Almost surely, 2^25305380 is an apocalyptic number.

25305380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25305380 is an abundant number, since it is smaller than the sum of its proper divisors (28840852).

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

25305380 is a wasteful number, since it uses less digits than its factorization.

25305380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23935 (or 23933 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 25305380 is about 5030.4453083201. The cubic root of 25305380 is about 293.5875407701.

The spelling of 25305380 in words is "twenty-five million, three hundred five thousand, three hundred eighty".