25657090 has 8 divisors (see below), whose sum is σ = 46182780. Its totient is φ = 10262832.

The previous prime is 25657061. The next prime is 25657109. The reversal of 25657090 is 9075652.

It can be written as a sum of positive squares in 2 ways, for example, as 25090081 + 567009 = 5009^2 + 753^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1282845 + ... + 1282864.

Almost surely, 2^25657090 is an apocalyptic number.

25657090 is a deficient number, since it is larger than the sum of its proper divisors (20525690).

25657090 is a wasteful number, since it uses less digits than its factorization.

25657090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2565716.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 25657090 is about 5065.2828154013. The cubic root of 25657090 is about 294.9414419822.

The spelling of 25657090 in words is "twenty-five million, six hundred fifty-seven thousand, ninety".