25284240 has 60 divisors (see below), whose sum is σ = 84915324. Its totient is φ = 6742272.

The previous prime is 25284229. The next prime is 25284241. The reversal of 25284240 is 4248252.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2702736 + 22581504 = 1644^2 + 4752^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25284241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16839 + ... + 18278.

Almost surely, 2^25284240 is an apocalyptic number.

25284240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25284240 is an abundant number, since it is smaller than the sum of its proper divisors (59631084).

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

25284240 is a wasteful number, since it uses less digits than its factorization.

25284240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35136 (or 35127 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 25284240 is about 5028.3436636730. The cubic root of 25284240 is about 293.5057640927.

The spelling of 25284240 in words is "twenty-five million, two hundred eighty-four thousand, two hundred forty".