25869240 has 128 divisors (see below), whose sum is σ = 91368000. Its totient is φ = 6488064.

The previous prime is 25869167. The next prime is 25869269. The reversal of 25869240 is 4296852.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 25869195 and 25869204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17656 + ... + 19064.

Almost surely, 2^25869240 is an apocalyptic number.

25869240 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 25869240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45684000).

25869240 is an abundant number, since it is smaller than the sum of its proper divisors (65498760).

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

25869240 is a wasteful number, since it uses less digits than its factorization.

25869240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446 (or 1436 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 25869240 is about 5086.1812787198. The cubic root of 25869240 is about 295.7521360619.

The spelling of 25869240 in words is "twenty-five million, eight hundred sixty-nine thousand, two hundred forty".