25340240 has 20 divisors (see below), whose sum is σ = 58916244. Its totient is φ = 10136064.

The previous prime is 25340233. The next prime is 25340257. The reversal of 25340240 is 4204352.

It can be written as a sum of positive squares in 2 ways, for example, as 14077504 + 11262736 = 3752^2 + 3356^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 158297 + ... + 158456.

Almost surely, 2^25340240 is an apocalyptic number.

25340240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25340240 is an abundant number, since it is smaller than the sum of its proper divisors (33576004).

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

25340240 is a wasteful number, since it uses less digits than its factorization.

25340240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316766 (or 316760 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 25340240 is about 5033.9090178508. The cubic root of 25340240 is about 293.7222916372.

Adding to 25340240 its reverse (4204352), we get a palindrome (29544592).

The spelling of 25340240 in words is "twenty-five million, three hundred forty thousand, two hundred forty".