25440312 has 32 divisors (see below), whose sum is σ = 65322000. Its totient is φ = 8250624.

The previous prime is 25440307. The next prime is 25440319. The reversal of 25440312 is 21304452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25440319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13437 + ... + 15212.

Almost surely, 2^25440312 is an apocalyptic number.

It is an amenable number.

25440312 is an abundant number, since it is smaller than the sum of its proper divisors (39881688).

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

25440312 is a wasteful number, since it uses less digits than its factorization.

25440312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28695 (or 28691 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 25440312 is about 5043.8390140844. The cubic root of 25440312 is about 294.1084333239.

Adding to 25440312 its reverse (21304452), we get a palindrome (46744764).

It can be divided in two parts, 25440 and 312, that added together give a palindrome (25752).

The spelling of 25440312 in words is "twenty-five million, four hundred forty thousand, three hundred twelve".