53493760 has 60 divisors (see below), whose sum is σ = 128577708. Its totient is φ = 21364736.

The previous prime is 53493757. The next prime is 53493773. The reversal of 53493760 is 6739435.

It can be written as a sum of positive squares in 2 ways, for example, as 15745024 + 37748736 = 3968^2 + 6144^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81594 + ... + 82246.

Almost surely, 2^53493760 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 53493760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64288854).

53493760 is an abundant number, since it is smaller than the sum of its proper divisors (75083948).

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

53493760 is an frugal number, since it uses more digits than its factorization.

53493760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 37.

The square root of 53493760 is about 7313.9428491068. The cubic root of 53493760 is about 376.7914519422.

The spelling of 53493760 in words is "fifty-three million, four hundred ninety-three thousand, seven hundred sixty".