25478490 has 32 divisors (see below), whose sum is σ = 61384896. Its totient is φ = 6768000.

The previous prime is 25478483. The next prime is 25478491. The reversal of 25478490 is 9487452.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25478491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6990 + ... + 9990.

It is an arithmetic number, because the mean of its divisors is an integer number (1918278).

Almost surely, 2^25478490 is an apocalyptic number.

25478490 is an abundant number, since it is smaller than the sum of its proper divisors (35906406).

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

25478490 is a wasteful number, since it uses less digits than its factorization.

25478490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3294.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 25478490 is about 5047.6222124878. The cubic root of 25478490 is about 294.2554815681.

The spelling of 25478490 in words is "twenty-five million, four hundred seventy-eight thousand, four hundred ninety".