253645136 has 40 divisors (see below), whose sum is σ = 535159200. Its totient is φ = 116000640.

The previous prime is 253645123. The next prime is 253645141. The reversal of 253645136 is 631546352.

It is a junction number, because it is equal to n+sod(n) for n = 253645096 and 253645105.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5570 + ... + 23201.

It is an arithmetic number, because the mean of its divisors is an integer number (13378980).

Almost surely, 2^253645136 is an apocalyptic number.

It is an amenable number.

253645136 is an abundant number, since it is smaller than the sum of its proper divisors (281514064).

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

253645136 is a wasteful number, since it uses less digits than its factorization.

253645136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28827 (or 28821 counting only the distinct ones).

The product of its digits is 64800, while the sum is 35.

The square root of 253645136 is about 15926.2404854379. The cubic root of 253645136 is about 633.0074861830.

The spelling of 253645136 in words is "two hundred fifty-three million, six hundred forty-five thousand, one hundred thirty-six".