653838 has 16 divisors (see below), whose sum is σ = 1330560. Its totient is φ = 214136.

The previous prime is 653831. The next prime is 653879. The reversal of 653838 is 838356.

It is a junction number, because it is equal to n+sod(n) for n = 653799 and 653808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 570 + ... + 1277.

It is an arithmetic number, because the mean of its divisors is an integer number (83160).

2⁶⁵³⁸³⁸ is an apocalyptic number.

653838 is an abundant number, since it is smaller than the sum of its proper divisors (676722).

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

653838 is a wasteful number, since it uses less digits than its factorization.

653838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1911.

The product of its digits is 17280, while the sum is 33.

The square root of 653838 is about 808.6024981411. The cubic root of 653838 is about 86.7940696891.

The spelling of 653838 in words is "six hundred fifty-three thousand, eight hundred thirty-eight".