253742436 has 48 divisors (see below), whose sum is σ = 658889280. Its totient is φ = 84447360.

The previous prime is 253742413. The next prime is 253742443. The reversal of 253742436 is 634247352.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 253742436.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 86140 + ... + 89036.

It is an arithmetic number, because the mean of its divisors is an integer number (13726860).

Almost surely, 2^253742436 is an apocalyptic number.

It is an amenable number.

253742436 is an abundant number, since it is smaller than the sum of its proper divisors (405146844).

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

253742436 is a wasteful number, since it uses less digits than its factorization.

253742436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3721 (or 3713 counting only the distinct ones).

The product of its digits is 120960, while the sum is 36.

The square root of 253742436 is about 15929.2948996495. The cubic root of 253742436 is about 633.0884178282.

Adding to 253742436 its reverse (634247352), we get a palindrome (887989788).

The spelling of 253742436 in words is "two hundred fifty-three million, seven hundred forty-two thousand, four hundred thirty-six".