25000440 has 32 divisors (see below), whose sum is σ = 75001680. Its totient is φ = 6666752.

The previous prime is 25000439. The next prime is 25000487. The reversal of 25000440 is 4400052.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104049 + ... + 104288.

Almost surely, 2^25000440 is an apocalyptic number.

25000440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25000440 is an abundant number, since it is smaller than the sum of its proper divisors (50001240).

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

25000440 is a wasteful number, since it uses less digits than its factorization.

25000440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208351 (or 208347 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 25000440 is about 5000.0439998064. The cubic root of 25000440 is about 292.4034892350.

Adding to 25000440 its reverse (4400052), we get a palindrome (29400492).

The spelling of 25000440 in words is "twenty-five million, four hundred forty", and thus it is an aban number.