25328493 has 6 divisors (see below), whose sum is σ = 36585614. Its totient is φ = 16885656.

The previous prime is 25328491. The next prime is 25328507. The reversal of 25328493 is 39482352.

It can be written as a sum of positive squares in only one way, i.e., 19554084 + 5774409 = 4422^2 + 2403^2 .

It is not a de Polignac number, because 25328493 - 2¹ = 25328491 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25328491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1407130 + ... + 1407147.

Almost surely, 2^25328493 is an apocalyptic number.

It is an amenable number.

25328493 is a deficient number, since it is larger than the sum of its proper divisors (11257121).

25328493 is a wasteful number, since it uses less digits than its factorization.

25328493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814283 (or 2814280 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 25328493 is about 5032.7420955181. The cubic root of 25328493 is about 293.6768975781.

It can be divided in two parts, 2532 and 8493, that added together give a square (11025 = 105²).

The spelling of 25328493 in words is "twenty-five million, three hundred twenty-eight thousand, four hundred ninety-three".