53287640 has 32 divisors (see below), whose sum is σ = 137026080. Its totient is φ = 18269952.

The previous prime is 53287607. The next prime is 53287643. The reversal of 53287640 is 4678235.

It is a happy number.

53287640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 53287640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53287643) 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, 94877 + ... + 95436.

It is an arithmetic number, because the mean of its divisors is an integer number (4282065).

Almost surely, 2^53287640 is an apocalyptic number.

It is an amenable number.

53287640 is an abundant number, since it is smaller than the sum of its proper divisors (83738440).

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

53287640 is a wasteful number, since it uses less digits than its factorization.

53287640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190331 (or 190327 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 53287640 is about 7299.8383543747. The cubic root of 53287640 is about 376.3068831559.

The spelling of 53287640 in words is "fifty-three million, two hundred eighty-seven thousand, six hundred forty".