53303040 has 216 divisors, whose sum is σ = 211087968. Its totient is φ = 12165120.

The previous prime is 53303039. The next prime is 53303057. The reversal of 53303040 is 4030335.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 80310 + ... + 80970.

Almost surely, 2^53303040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53303040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105543984).

53303040 is an abundant number, since it is smaller than the sum of its proper divisors (157784928).

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

53303040 is a wasteful number, since it uses less digits than its factorization.

53303040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695 (or 678 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 18.

The square root of 53303040 is about 7300.8930960534. The cubic root of 53303040 is about 376.3431302595.

Adding to 53303040 its reverse (4030335), we get a palindrome (57333375).

The spelling of 53303040 in words is "fifty-three million, three hundred three thousand, forty".