253856634 has 8 divisors (see below), whose sum is σ = 507713280. Its totient is φ = 84618876.

The previous prime is 253856623. The next prime is 253856639. The reversal of 253856634 is 436658352.

It is a sphenic number, since it is the product of 3 distinct primes.

253856634 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (253856639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21154714 + ... + 21154725.

It is an arithmetic number, because the mean of its divisors is an integer number (63464160).

Almost surely, 2^253856634 is an apocalyptic number.

253856634 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

253856634 is a wasteful number, since it uses less digits than its factorization.

253856634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42309444.

The product of its digits is 518400, while the sum is 42.

The square root of 253856634 is about 15932.8790242065. The cubic root of 253856634 is about 633.1833784098.

The spelling of 253856634 in words is "two hundred fifty-three million, eight hundred fifty-six thousand, six hundred thirty-four".