53305380 has 144 divisors (see below), whose sum is σ = 169513344. Its totient is φ = 13547520.

The previous prime is 53305361. The next prime is 53305381. The reversal of 53305380 is 8350335.

53305380 is a `hidden beast` number, since 533 + 0 + 53 + 80 = 666.

It is not an unprimeable number, because it can be changed into a prime (53305381) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 549492 + ... + 549588.

It is an arithmetic number, because the mean of its divisors is an integer number (1177176).

Almost surely, 2^53305380 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 53305380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84756672).

53305380 is an abundant number, since it is smaller than the sum of its proper divisors (116207964).

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

53305380 is a wasteful number, since it uses less digits than its factorization.

53305380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 53305380 is about 7301.0533486614. The cubic root of 53305380 is about 376.3486373253.

The spelling of 53305380 in words is "fifty-three million, three hundred five thousand, three hundred eighty".