53305040 has 40 divisors (see below), whose sum is σ = 124445160. Its totient is φ = 21234176.

The previous prime is 53305039. The next prime is 53305061. The reversal of 53305040 is 4050335.

It can be written as a sum of positive squares in 4 ways, for example, as 190096 + 53114944 = 436^2 + 7288^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20282 + ... + 22758.

It is an arithmetic number, because the mean of its divisors is an integer number (3111129).

Almost surely, 2^53305040 is an apocalyptic number.

It is an amenable number.

53305040 is an abundant number, since it is smaller than the sum of its proper divisors (71140120).

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

53305040 is a wasteful number, since it uses less digits than its factorization.

53305040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2759 (or 2753 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 20.

The square root of 53305040 is about 7301.0300643128. The cubic root of 53305040 is about 376.3478371633.

Adding to 53305040 its reverse (4050335), we get a palindrome (57355375).

The spelling of 53305040 in words is "fifty-three million, three hundred five thousand, forty".