25152440 has 16 divisors (see below), whose sum is σ = 56593080. Its totient is φ = 10060960.

The previous prime is 25152437. The next prime is 25152481. The reversal of 25152440 is 4425152.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314366 + ... + 314445.

Almost surely, 2^25152440 is an apocalyptic number.

25152440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25152440 is an abundant number, since it is smaller than the sum of its proper divisors (31440640).

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

25152440 is a wasteful number, since it uses less digits than its factorization.

25152440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628822 (or 628818 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 25152440 is about 5015.2208326254. The cubic root of 25152440 is about 292.9948862810.

Adding to 25152440 its reverse (4425152), we get a palindrome (29577592).

The spelling of 25152440 in words is "twenty-five million, one hundred fifty-two thousand, four hundred forty".