53042640 has 80 divisors (see below), whose sum is σ = 187928448. Its totient is φ = 12123648.

The previous prime is 53042621. The next prime is 53042641. The reversal of 53042640 is 4624035.

53042640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 53042640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53042641) 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 15 ways as a sum of consecutive naturals, for example, 14107 + ... + 17466.

Almost surely, 2^53042640 is an apocalyptic number.

It is an amenable number.

53042640 is an abundant number, since it is smaller than the sum of its proper divisors (134885808).

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

53042640 is a wasteful number, since it uses less digits than its factorization.

53042640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31596 (or 31590 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 53042640 is about 7283.0378277200. The cubic root of 53042640 is about 375.7292830262.

Adding to 53042640 its reverse (4624035), we get a palindrome (57666675).

The spelling of 53042640 in words is "fifty-three million, forty-two thousand, six hundred forty".