53340440 has 16 divisors (see below), whose sum is σ = 120016080. Its totient is φ = 21336160.

The previous prime is 53340439. The next prime is 53340451. The reversal of 53340440 is 4404335.

It is a happy number.

53340440 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 an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 666716 + ... + 666795.

It is an arithmetic number, because the mean of its divisors is an integer number (7501005).

Almost surely, 2^53340440 is an apocalyptic number.

It is an amenable number.

53340440 is an abundant number, since it is smaller than the sum of its proper divisors (66675640).

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

53340440 is a wasteful number, since it uses less digits than its factorization.

53340440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333522 (or 1333518 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 53340440 is about 7303.4539774000. The cubic root of 53340440 is about 376.4311298833.

Adding to 53340440 its reverse (4404335), we get a palindrome (57744775).

The spelling of 53340440 in words is "fifty-three million, three hundred forty thousand, four hundred forty".