25440120 has 48 divisors (see below), whose sum is σ = 82681560. Its totient is φ = 6783936.

The previous prime is 25440091. The next prime is 25440167. The reversal of 25440120 is 2104452.

25440120 is a `hidden beast` number, since 2 + 544 + 0 + 120 = 666.

It is a super-2 number, since 2×25440120² = 1294399411228800, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 25440093 and 25440102.

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, 34974 + ... + 35693.

Almost surely, 2^25440120 is an apocalyptic number.

25440120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25440120 is an abundant number, since it is smaller than the sum of its proper divisors (57241440).

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

25440120 is a wasteful number, since it uses less digits than its factorization.

25440120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70684 (or 70677 counting only the distinct ones).

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

The square root of 25440120 is about 5043.8199809272. The cubic root of 25440120 is about 294.1076934357.

Adding to 25440120 its reverse (2104452), we get a palindrome (27544572).

The spelling of 25440120 in words is "twenty-five million, four hundred forty thousand, one hundred twenty".