53307540 has 288 divisors, whose sum is σ = 201801600. Its totient is φ = 11197440.

The previous prime is 53307533. The next prime is 53307557. The reversal of 53307540 is 4570335.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 489006 + ... + 489114.

It is an arithmetic number, because the mean of its divisors is an integer number (700700).

Almost surely, 2^53307540 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 53307540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100900800).

53307540 is an abundant number, since it is smaller than the sum of its proper divisors (148494060).

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

53307540 is a wasteful number, since it uses less digits than its factorization.

53307540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 27.

The square root of 53307540 is about 7301.2012710238. The cubic root of 53307540 is about 376.3537206275.

Adding to 53307540 its reverse (4570335), we get a palindrome (57877875).

The spelling of 53307540 in words is "fifty-three million, three hundred seven thousand, five hundred forty".