25869890 has 8 divisors (see below), whose sum is σ = 46565820. Its totient is φ = 10347952.

The previous prime is 25869889. The next prime is 25869923. The reversal of 25869890 is 9896852.

It can be written as a sum of positive squares in 2 ways, for example, as 23222761 + 2647129 = 4819^2 + 1627^2 .

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

It is a super-2 number, since 2×25869890² = 1338502417224200, 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, 1293485 + ... + 1293504.

Almost surely, 2^25869890 is an apocalyptic number.

25869890 is a deficient number, since it is larger than the sum of its proper divisors (20695930).

25869890 is a wasteful number, since it uses less digits than its factorization.

25869890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2586996.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 25869890 is about 5086.2451769454. The cubic root of 25869890 is about 295.7546130999.

The spelling of 25869890 in words is "twenty-five million, eight hundred sixty-nine thousand, eight hundred ninety".