253838742 has 16 divisors (see below), whose sum is σ = 511331520. Its totient is φ = 84003912.

The previous prime is 253838729. The next prime is 253838777. The reversal of 253838742 is 247838352.

It is a junction number, because it is equal to n+sod(n) for n = 253838694 and 253838703.

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, 151348 + ... + 153015.

It is an arithmetic number, because the mean of its divisors is an integer number (31958220).

Almost surely, 2^253838742 is an apocalyptic number.

253838742 is an abundant number, since it is smaller than the sum of its proper divisors (257492778).

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

253838742 is a wasteful number, since it uses less digits than its factorization.

253838742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304507.

The product of its digits is 322560, while the sum is 42.

The square root of 253838742 is about 15932.3175338681. The cubic root of 253838742 is about 633.1685023188.

The spelling of 253838742 in words is "two hundred fifty-three million, eight hundred thirty-eight thousand, seven hundred forty-two".