25408489 has 4 divisors (see below), whose sum is σ = 26903124. Its totient is φ = 23913856.

The previous prime is 25408483. The next prime is 25408517. The reversal of 25408489 is 98480452.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19430464 + 5978025 = 4408^2 + 2445^2 .

It is a cyclic number.

It is not a de Polignac number, because 25408489 - 2⁵ = 25408457 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25408483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 747292 + ... + 747325.

It is an arithmetic number, because the mean of its divisors is an integer number (6725781).

Almost surely, 2^25408489 is an apocalyptic number.

It is an amenable number.

25408489 is a deficient number, since it is larger than the sum of its proper divisors (1494635).

25408489 is a wasteful number, since it uses less digits than its factorization.

25408489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494634.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 25408489 is about 5040.6833862087. The cubic root of 25408489 is about 293.9857498453.

The spelling of 25408489 in words is "twenty-five million, four hundred eight thousand, four hundred eighty-nine".