25523340 has 48 divisors (see below), whose sum is σ = 73403232. Its totient is φ = 6621696.

The previous prime is 25523299. The next prime is 25523357. The reversal of 25523340 is 4332552.

It is a self number, because there is not a number n which added to its sum of digits gives 25523340.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3529 + ... + 7968.

It is an arithmetic number, because the mean of its divisors is an integer number (1529234).

Almost surely, 2^25523340 is an apocalyptic number.

25523340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25523340 is an abundant number, since it is smaller than the sum of its proper divisors (47879892).

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

25523340 is a wasteful number, since it uses less digits than its factorization.

25523340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11546 (or 11544 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 25523340 is about 5052.0629449760. The cubic root of 25523340 is about 294.4280404874.

Adding to 25523340 its reverse (4332552), we get a palindrome (29855892).

The spelling of 25523340 in words is "twenty-five million, five hundred twenty-three thousand, three hundred forty".