25226240 has 88 divisors (see below), whose sum is σ = 65340240. Its totient is φ = 9289728.

The previous prime is 25226231. The next prime is 25226269. The reversal of 25226240 is 4262252.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66371 + ... + 66749.

Almost surely, 2^25226240 is an apocalyptic number.

25226240 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 25226240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32670120).

25226240 is an abundant number, since it is smaller than the sum of its proper divisors (40114000).

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

25226240 is a wasteful number, since it uses less digits than its factorization.

25226240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 25226240 is about 5022.5730457605. The cubic root of 25226240 is about 293.2811661133.

Adding to 25226240 its reverse (4262252), we get a palindrome (29488492).

The spelling of 25226240 in words is "twenty-five million, two hundred twenty-six thousand, two hundred forty".