25668290 has 8 divisors (see below), whose sum is σ = 46202940. Its totient is φ = 10267312.

The previous prime is 25668287. The next prime is 25668311. The reversal of 25668290 is 9286652.

It can be written as a sum of positive squares in 2 ways, for example, as 24098281 + 1570009 = 4909^2 + 1253^2 .

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

It is a super-2 number, since 2×25668290² = 1317722223048200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1283405 + ... + 1283424.

Almost surely, 2^25668290 is an apocalyptic number.

25668290 is a deficient number, since it is larger than the sum of its proper divisors (20534650).

25668290 is a wasteful number, since it uses less digits than its factorization.

25668290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566836.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 25668290 is about 5066.3882598948. The cubic root of 25668290 is about 294.9843523252.

The spelling of 25668290 in words is "twenty-five million, six hundred sixty-eight thousand, two hundred ninety".