25238690 has 8 divisors (see below), whose sum is σ = 45429660. Its totient is φ = 10095472.

The previous prime is 25238687. The next prime is 25238701. The reversal of 25238690 is 9683252.

It can be written as a sum of positive squares in 2 ways, for example, as 22572001 + 2666689 = 4751^2 + 1633^2 .

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

It is a super-2 number, since 2×25238690² = 1273982945832200, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25238690.

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, 1261925 + ... + 1261944.

Almost surely, 2^25238690 is an apocalyptic number.

25238690 is a deficient number, since it is larger than the sum of its proper divisors (20190970).

25238690 is a wasteful number, since it uses less digits than its factorization.

25238690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2523876.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 25238690 is about 5023.8122974490. The cubic root of 25238690 is about 293.3294062261.

The spelling of 25238690 in words is "twenty-five million, two hundred thirty-eight thousand, six hundred ninety".