25189240 has 48 divisors (see below), whose sum is σ = 60233400. Its totient is φ = 9478656.

The previous prime is 25189217. The next prime is 25189243. The reversal of 25189240 is 4298152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25189243) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 10471 + ... + 12649.

Almost surely, 2^25189240 is an apocalyptic number.

25189240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25189240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30116700).

25189240 is an abundant number, since it is smaller than the sum of its proper divisors (35044160).

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

25189240 is a wasteful number, since it uses less digits than its factorization.

25189240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224 (or 2203 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 25189240 is about 5018.8883231250. Note that the first 3 decimals coincide. The cubic root of 25189240 is about 293.1377081792.

The spelling of 25189240 in words is "twenty-five million, one hundred eighty-nine thousand, two hundred forty".