25283440 has 160 divisors (see below), whose sum is σ = 75995136. Its totient is φ = 7603200.

The previous prime is 25283413. The next prime is 25283443. The reversal of 25283440 is 4438252.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 25283399 and 25283408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25283443) 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 31 ways as a sum of consecutive naturals, for example, 167365 + ... + 167515.

Almost surely, 2^25283440 is an apocalyptic number.

25283440 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 25283440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37997568).

25283440 is an abundant number, since it is smaller than the sum of its proper divisors (50711696).

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

25283440 is a wasteful number, since it uses less digits than its factorization.

25283440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 25283440 is about 5028.2641139861. The cubic root of 25283440 is about 293.5026685269.

The spelling of 25283440 in words is "twenty-five million, two hundred eighty-three thousand, four hundred forty".