53856405 has 12 divisors (see below), whose sum is σ = 93351180. Its totient is φ = 28723392.

The previous prime is 53856403. The next prime is 53856479. The reversal of 53856405 is 50465835.

53856405 is a `hidden beast` number, since 5 + 3 + 8 + 5 + 640 + 5 = 666.

53856405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7969329 + 45887076 = 2823^2 + 6774^2 .

It is not a de Polignac number, because 53856405 - 2¹ = 53856403 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 53856405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53856403) 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 11 ways as a sum of consecutive naturals, for example, 598360 + ... + 598449.

It is an arithmetic number, because the mean of its divisors is an integer number (7779265).

Almost surely, 2^53856405 is an apocalyptic number.

It is an amenable number.

53856405 is a deficient number, since it is larger than the sum of its proper divisors (39494775).

53856405 is a wasteful number, since it uses less digits than its factorization.

53856405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196820 (or 1196817 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 53856405 is about 7338.6923222056. The cubic root of 53856405 is about 377.6409835527.

The spelling of 53856405 in words is "fifty-three million, eight hundred fifty-six thousand, four hundred five".