25440532 has 12 divisors (see below), whose sum is σ = 47945716. Its totient is φ = 11741760.

The previous prime is 25440529. The next prime is 25440533. The reversal of 25440532 is 23504452.

It can be written as a sum of positive squares in 2 ways, for example, as 1175056 + 24265476 = 1084^2 + 4926^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25440497 and 25440506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25440533) 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, 244569 + ... + 244672.

Almost surely, 2^25440532 is an apocalyptic number.

It is an amenable number.

25440532 is a deficient number, since it is larger than the sum of its proper divisors (22505184).

25440532 is a wasteful number, since it uses less digits than its factorization.

25440532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489258 (or 489256 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 25440532 is about 5043.8608228221. The cubic root of 25440532 is about 294.1092811079.

Adding to 25440532 its reverse (23504452), we get a palindrome (48944984).

The spelling of 25440532 in words is "twenty-five million, four hundred forty thousand, five hundred thirty-two".