25120440 has 48 divisors (see below), whose sum is σ = 81642600. Its totient is φ = 6698688.

The previous prime is 25120427. The next prime is 25120483. The reversal of 25120440 is 4402152.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34530 + ... + 35249.

Almost surely, 2^25120440 is an apocalyptic number.

25120440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25120440 is an abundant number, since it is smaller than the sum of its proper divisors (56522160).

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

25120440 is a wasteful number, since it uses less digits than its factorization.

25120440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69796 (or 69789 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 25120440 is about 5012.0295290431. The cubic root of 25120440 is about 292.8705800469.

Adding to 25120440 its reverse (4402152), we get a palindrome (29522592).

The spelling of 25120440 in words is "twenty-five million, one hundred twenty thousand, four hundred forty".