25263240 has 32 divisors (see below), whose sum is σ = 75790080. Its totient is φ = 6736832.

The previous prime is 25263229. The next prime is 25263253. The reversal of 25263240 is 4236252.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 25263240.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105144 + ... + 105383.

It is an arithmetic number, because the mean of its divisors is an integer number (2368440).

Almost surely, 2^25263240 is an apocalyptic number.

25263240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25263240 is an abundant number, since it is smaller than the sum of its proper divisors (50526840).

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

25263240 is a wasteful number, since it uses less digits than its factorization.

25263240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210541 (or 210537 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 25263240 is about 5026.2550671449. The cubic root of 25263240 is about 293.4244838401.

Adding to 25263240 its reverse (4236252), we get a palindrome (29499492).

The spelling of 25263240 in words is "twenty-five million, two hundred sixty-three thousand, two hundred forty".