25286240 has 96 divisors (see below), whose sum is σ = 69237504. Its totient is φ = 8547840.

The previous prime is 25286201. The next prime is 25286249. The reversal of 25286240 is 4268252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25286249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119735 + ... + 119945.

It is an arithmetic number, because the mean of its divisors is an integer number (721224).

Almost surely, 2^25286240 is an apocalyptic number.

25286240 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 25286240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34618752).

25286240 is an abundant number, since it is smaller than the sum of its proper divisors (43951264).

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

25286240 is a wasteful number, since it uses less digits than its factorization.

25286240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 25286240 is about 5028.5425323845. The cubic root of 25286240 is about 293.5135027216.

The spelling of 25286240 in words is "twenty-five million, two hundred eighty-six thousand, two hundred forty".