25422440 has 32 divisors (see below), whose sum is σ = 57446280. Its totient is φ = 10125312.

The previous prime is 25422431. The next prime is 25422443. The reversal of 25422440 is 4422452.

It can be written as a sum of positive squares in 4 ways, for example, as 25421764 + 676 = 5042^2 + 26^2 .

It is not an unprimeable number, because it can be changed into a prime (25422443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9044 + ... + 11516.

Almost surely, 2^25422440 is an apocalyptic number.

25422440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25422440 is an abundant number, since it is smaller than the sum of its proper divisors (32023840).

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

25422440 is a wasteful number, since it uses less digits than its factorization.

25422440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2741 (or 2737 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 25422440 is about 5042.0670364445. The cubic root of 25422440 is about 294.0395461019.

Adding to 25422440 its reverse (4422452), we get a palindrome (29844892).

The spelling of 25422440 in words is "twenty-five million, four hundred twenty-two thousand, four hundred forty".