25458240 has 112 divisors (see below), whose sum is σ = 84417408. Its totient is φ = 6488064.

The previous prime is 25458229. The next prime is 25458247. The reversal of 25458240 is 4285452.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 25458198 and 25458207.

It is not an unprimeable number, because it can be changed into a prime (25458247) 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, 21504 + ... + 22656.

Almost surely, 2^25458240 is an apocalyptic number.

25458240 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 25458240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42208704).

25458240 is an abundant number, since it is smaller than the sum of its proper divisors (58959168).

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

25458240 is a wasteful number, since it uses less digits than its factorization.

25458240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196 (or 1186 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

The square root of 25458240 is about 5045.6159187952. The cubic root of 25458240 is about 294.1775039900.

The spelling of 25458240 in words is "twenty-five million, four hundred fifty-eight thousand, two hundred forty".