25440304 has 10 divisors (see below), whose sum is σ = 49290620. Its totient is φ = 12720144.

The previous prime is 25440299. The next prime is 25440307. The reversal of 25440304 is 40304452.

It is a happy number.

It is a super-2 number, since 2×25440304² = 1294418135224832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25440307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 794994 + ... + 795025.

It is an arithmetic number, because the mean of its divisors is an integer number (4929062).

Almost surely, 2^25440304 is an apocalyptic number.

It is an amenable number.

25440304 is a deficient number, since it is larger than the sum of its proper divisors (23850316).

25440304 is a wasteful number, since it uses less digits than its factorization.

25440304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590027 (or 1590021 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 25440304 is about 5043.8382210376. The cubic root of 25440304 is about 294.1084024953.

Adding to 25440304 its reverse (40304452), we get a palindrome (65744756).

The spelling of 25440304 in words is "twenty-five million, four hundred forty thousand, three hundred four".