25288394 has 4 divisors (see below), whose sum is σ = 37932594. Its totient is φ = 12644196.

The previous prime is 25288391. The next prime is 25288399. The reversal of 25288394 is 49388252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13965169 + 11323225 = 3737^2 + 3365^2 .

It is a Curzon number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (25288391) by changing a digit.

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 as a sum of consecutive naturals, namely, 6322097 + ... + 6322100.

Almost surely, 2^25288394 is an apocalyptic number.

25288394 is a deficient number, since it is larger than the sum of its proper divisors (12644200).

25288394 is a wasteful number, since it uses less digits than its factorization.

25288394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12644199.

The product of its digits is 138240, while the sum is 41.

The square root of 25288394 is about 5028.7567051907. The cubic root of 25288394 is about 293.5218367686.

The spelling of 25288394 in words is "twenty-five million, two hundred eighty-eight thousand, three hundred ninety-four".