53305640 has 32 divisors (see below), whose sum is σ = 126252000. Its totient is φ = 20199744.

The previous prime is 53305619. The next prime is 53305657. The reversal of 53305640 is 4650335.

It is a super-3 number, since 3×53305640³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

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, 34310 + ... + 35829.

It is an arithmetic number, because the mean of its divisors is an integer number (3945375).

Almost surely, 2^53305640 is an apocalyptic number.

It is an amenable number.

53305640 is an abundant number, since it is smaller than the sum of its proper divisors (72946360).

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

53305640 is a wasteful number, since it uses less digits than its factorization.

53305640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70169 (or 70165 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 53305640 is about 7301.0711542896. The cubic root of 53305640 is about 376.3492492115.

Adding to 53305640 its reverse (4650335), we get a palindrome (57955975).

The spelling of 53305640 in words is "fifty-three million, three hundred five thousand, six hundred forty".