53565040 has 40 divisors (see below), whose sum is σ = 125460720. Its totient is φ = 21267456.

The previous prime is 53565037. The next prime is 53565041. The reversal of 53565040 is 4056535.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53565041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8712 + ... + 13528.

It is an arithmetic number, because the mean of its divisors is an integer number (3136518).

Almost surely, 2^53565040 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 53565040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62730360).

53565040 is an abundant number, since it is smaller than the sum of its proper divisors (71895680).

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

53565040 is a wasteful number, since it uses less digits than its factorization.

53565040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4969 (or 4963 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 53565040 is about 7318.8141115894. The cubic root of 53565040 is about 376.9587348446.

The spelling of 53565040 in words is "fifty-three million, five hundred sixty-five thousand, forty".