25625240 has 16 divisors (see below), whose sum is σ = 57656880. Its totient is φ = 10250080.

The previous prime is 25625231. The next prime is 25625261. The reversal of 25625240 is 4252652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320276 + ... + 320355.

It is an arithmetic number, because the mean of its divisors is an integer number (3603555).

Almost surely, 2^25625240 is an apocalyptic number.

25625240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25625240 is an abundant number, since it is smaller than the sum of its proper divisors (32031640).

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

25625240 is a wasteful number, since it uses less digits than its factorization.

25625240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640642 (or 640638 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 25625240 is about 5062.1378882840. The cubic root of 25625240 is about 294.8193474044.

Adding to 25625240 its reverse (4252652), we get a palindrome (29877892).

The spelling of 25625240 in words is "twenty-five million, six hundred twenty-five thousand, two hundred forty".