25480240 has 20 divisors (see below), whose sum is σ = 59241744. Its totient is φ = 10192064.

The previous prime is 25480211. The next prime is 25480261. The reversal of 25480240 is 4208452.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159172 + ... + 159331.

Almost surely, 2^25480240 is an apocalyptic number.

25480240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25480240 is an abundant number, since it is smaller than the sum of its proper divisors (33761504).

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

25480240 is a wasteful number, since it uses less digits than its factorization.

25480240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318516 (or 318510 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 25480240 is about 5047.7955584592. The cubic root of 25480240 is about 294.2622184312.

Adding to 25480240 its reverse (4208452), we get a palindrome (29688692).

The spelling of 25480240 in words is "twenty-five million, four hundred eighty thousand, two hundred forty".