253305644 has 48 divisors (see below), whose sum is σ = 502588800. Its totient is φ = 110981376.

The previous prime is 253305641. The next prime is 253305653. The reversal of 253305644 is 446503352.

It is a self number, because there is not a number n which added to its sum of digits gives 253305644.

It is not an unprimeable number, because it can be changed into a prime (253305641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74567 + ... + 77889.

It is an arithmetic number, because the mean of its divisors is an integer number (10470600).

Almost surely, 2^253305644 is an apocalyptic number.

It is an amenable number.

253305644 is a deficient number, since it is larger than the sum of its proper divisors (249283156).

253305644 is a wasteful number, since it uses less digits than its factorization.

253305644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422 (or 3420 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 32.

The square root of 253305644 is about 15915.5786574036. The cubic root of 253305644 is about 632.7249432433.

Adding to 253305644 its reverse (446503352), we get a palindrome (699808996).

The spelling of 253305644 in words is "two hundred fifty-three million, three hundred five thousand, six hundred forty-four".