25286490 has 48 divisors (see below), whose sum is σ = 66134016. Its totient is φ = 6703200.

The previous prime is 25286479. The next prime is 25286491. The reversal of 25286490 is 9468252.

It is a happy number.

25286490 is a `hidden beast` number, since 2 + 5 + 2 + 8 + 649 + 0 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25286491) 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 23 ways as a sum of consecutive naturals, for example, 16455 + ... + 17925.

It is an arithmetic number, because the mean of its divisors is an integer number (1377792).

Almost surely, 2^25286490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25286490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33067008).

25286490 is an abundant number, since it is smaller than the sum of its proper divisors (40847526).

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

25286490 is a wasteful number, since it uses less digits than its factorization.

25286490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675 (or 1672 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 25286490 is about 5028.5673904205. The cubic root of 25286490 is about 293.5144700215.

The spelling of 25286490 in words is "twenty-five million, two hundred eighty-six thousand, four hundred ninety".