25639234 has 16 divisors (see below), whose sum is σ = 39076128. Its totient is φ = 12615552.

The previous prime is 25639231. The next prime is 25639241. The reversal of 25639234 is 43293652.

It is a self number, because there is not a number n which added to its sum of digits gives 25639234.

It is not an unprimeable number, because it can be changed into a prime (25639231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54669 + ... + 55135.

It is an arithmetic number, because the mean of its divisors is an integer number (2442258).

Almost surely, 2^25639234 is an apocalyptic number.

25639234 is a deficient number, since it is larger than the sum of its proper divisors (13436894).

25639234 is a wasteful number, since it uses less digits than its factorization.

25639234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849.

The product of its digits is 38880, while the sum is 34.

The square root of 25639234 is about 5063.5199219515. The cubic root of 25639234 is about 294.8730048031.

The spelling of 25639234 in words is "twenty-five million, six hundred thirty-nine thousand, two hundred thirty-four".