25404489 has 32 divisors (see below), whose sum is σ = 42854400. Its totient is φ = 14723280.

The previous prime is 25404479. The next prime is 25404497. The reversal of 25404489 is 98440452.

It is not a de Polignac number, because 25404489 - 2⁴ = 25404473 is a prime.

It is a super-2 number, since 2×25404489² = 1290776122702242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25404419) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4972 + ... + 8690.

It is an arithmetic number, because the mean of its divisors is an integer number (1339200).

Almost surely, 2^25404489 is an apocalyptic number.

It is an amenable number.

25404489 is a deficient number, since it is larger than the sum of its proper divisors (17449911).

25404489 is a wasteful number, since it uses less digits than its factorization.

25404489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3762 (or 3756 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 25404489 is about 5040.2865989941. The cubic root of 25404489 is about 293.9703218689.

The spelling of 25404489 in words is "twenty-five million, four hundred four thousand, four hundred eighty-nine".