25928642 has 4 divisors (see below), whose sum is σ = 38892966. Its totient is φ = 12964320.

The previous prime is 25928629. The next prime is 25928647. The reversal of 25928642 is 24682952.

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., 25411681 + 516961 = 5041^2 + 719^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25928596 and 25928605.

It is not an unprimeable number, because it can be changed into a prime (25928647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6482159 + ... + 6482162.

Almost surely, 2^25928642 is an apocalyptic number.

25928642 is a deficient number, since it is larger than the sum of its proper divisors (12964324).

25928642 is a wasteful number, since it uses less digits than its factorization.

25928642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12964323.

The product of its digits is 69120, while the sum is 38.

The square root of 25928642 is about 5092.0174783675. The cubic root of 25928642 is about 295.9783357044.

The spelling of 25928642 in words is "twenty-five million, nine hundred twenty-eight thousand, six hundred forty-two".