253665288 has 36 divisors (see below), whose sum is σ = 687376365. Its totient is φ = 84510048.

The previous prime is 253665263. The next prime is 253665289. The reversal of 253665288 is 882566352.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

253665288 is a `hidden beast` number, since 2 + 5 + 366 + 5 + 288 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 249576804 + 4088484 = 15798^2 + 2022^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=11262.

It is a super-2 number, since 2×253665288² = 128692156672245888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (253665289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 134206 + ... + 136082.

Almost surely, 2^253665288 is an apocalyptic number.

It is an amenable number.

253665288 is an abundant number, since it is smaller than the sum of its proper divisors (433711077).

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

253665288 is an equidigital number, since it uses as much as digits as its factorization.

253665288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3766 (or 1882 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 253665288 is about 15926.8731394458. The cubic root of 253665288 is about 633.0242497991.

The spelling of 253665288 in words is "two hundred fifty-three million, six hundred sixty-five thousand, two hundred eighty-eight".