53243840 has 56 divisors (see below), whose sum is σ = 136550400. Its totient is φ = 19657728.

The previous prime is 53243837. The next prime is 53243849. The reversal of 53243840 is 4834235.

53243840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53243849) by changing a digit.

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, 2240 + ... + 10559.

It is an arithmetic number, because the mean of its divisors is an integer number (2438400).

Almost surely, 2^53243840 is an apocalyptic number.

It is an amenable number.

53243840 is an abundant number, since it is smaller than the sum of its proper divisors (83306560).

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

53243840 is a wasteful number, since it uses less digits than its factorization.

53243840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12829 (or 12819 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 53243840 is about 7296.8376712107. The cubic root of 53243840 is about 376.2037525523.

The spelling of 53243840 in words is "fifty-three million, two hundred forty-three thousand, eight hundred forty".