25989240 has 32 divisors (see below), whose sum is σ = 77968080. Its totient is φ = 6930432.

The previous prime is 25989217. The next prime is 25989251. The reversal of 25989240 is 4298952.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108169 + ... + 108408.

Almost surely, 2^25989240 is an apocalyptic number.

25989240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25989240 is an abundant number, since it is smaller than the sum of its proper divisors (51978840).

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

25989240 is a wasteful number, since it uses less digits than its factorization.

25989240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216591 (or 216587 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 25989240 is about 5097.9642996004. The cubic root of 25989240 is about 296.2087339484.

The spelling of 25989240 in words is "twenty-five million, nine hundred eighty-nine thousand, two hundred forty".