253640270 has 24 divisors (see below), whose sum is σ = 494376696. Its totient is φ = 93651168.

The previous prime is 253640267. The next prime is 253640279. The reversal of 253640270 is 72046352.

253640270 = 2183² + 2184² + ... + 2234².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253640279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73352 + ... + 76731.

It is an arithmetic number, because the mean of its divisors is an integer number (20599029).

Almost surely, 2^253640270 is an apocalyptic number.

253640270 is a deficient number, since it is larger than the sum of its proper divisors (240736426).

253640270 is a wasteful number, since it uses less digits than its factorization.

253640270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150116 (or 150103 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 253640270 is about 15926.0877179551. The cubic root of 253640270 is about 633.0034382256.

The spelling of 253640270 in words is "two hundred fifty-three million, six hundred forty thousand, two hundred seventy".