25492240 has 20 divisors (see below), whose sum is σ = 59269644. Its totient is φ = 10196864.

The previous prime is 25492237. The next prime is 25492241. The reversal of 25492240 is 4229452.

It can be written as a sum of positive squares in 2 ways, for example, as 18352656 + 7139584 = 4284^2 + 2672^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 25492199 and 25492208.

It is not an unprimeable number, because it can be changed into a prime (25492241) 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 3 ways as a sum of consecutive naturals, for example, 159247 + ... + 159406.

Almost surely, 2^25492240 is an apocalyptic number.

25492240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25492240 is an abundant number, since it is smaller than the sum of its proper divisors (33777404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25492240 is a wasteful number, since it uses less digits than its factorization.

25492240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318666 (or 318660 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 25492240 is about 5048.9840562236. The cubic root of 25492240 is about 294.3084057569.

The spelling of 25492240 in words is "twenty-five million, four hundred ninety-two thousand, two hundred forty".