53685380 has 72 divisors (see below), whose sum is σ = 135739800. Its totient is φ = 17762304.

The previous prime is 53685377. The next prime is 53685391. The reversal of 53685380 is 8358635.

It can be written as a sum of positive squares in 4 ways, for example, as 5466244 + 48219136 = 2338^2 + 6944^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27476 + ... + 29364.

It is an arithmetic number, because the mean of its divisors is an integer number (1885275).

Almost surely, 2^53685380 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 53685380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67869900).

53685380 is an abundant number, since it is smaller than the sum of its proper divisors (82054420).

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

53685380 is a wasteful number, since it uses less digits than its factorization.

53685380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941 (or 1932 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 53685380 is about 7327.0307765151. The cubic root of 53685380 is about 377.2408173700.

The spelling of 53685380 in words is "fifty-three million, six hundred eighty-five thousand, three hundred eighty".