53040340 has 48 divisors (see below), whose sum is σ = 119608272. Its totient is φ = 19685376.

The previous prime is 53040331. The next prime is 53040341. The reversal of 53040340 is 4304035.

It can be written as a sum of positive squares in 8 ways, for example, as 1602756 + 51437584 = 1266^2 + 7172^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53040341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23752 + ... + 25888.

It is an arithmetic number, because the mean of its divisors is an integer number (2491839).

Almost surely, 2^53040340 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 53040340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59804136).

53040340 is an abundant number, since it is smaller than the sum of its proper divisors (66567932).

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

53040340 is a wasteful number, since it uses less digits than its factorization.

53040340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2236 (or 2234 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 53040340 is about 7282.8799248649. The cubic root of 53040340 is about 375.7238522392.

Adding to 53040340 its reverse (4304035), we get a palindrome (57344375).

The spelling of 53040340 in words is "fifty-three million, forty thousand, three hundred forty".