53728785 has 64 divisors (see below), whose sum is σ = 105557760. Its totient is φ = 25712640.

The previous prime is 53728757. The next prime is 53728853. The reversal of 53728785 is 58782735.

53728785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53728785 - 2¹³ = 53720593 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 53728785.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 143859 + ... + 144231.

It is an arithmetic number, because the mean of its divisors is an integer number (1649340).

Almost surely, 2^53728785 is an apocalyptic number.

53728785 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

53728785 is a deficient number, since it is larger than the sum of its proper divisors (51828975).

53728785 is a wasteful number, since it uses less digits than its factorization.

53728785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 489 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 53728785 is about 7329.9921555210. The cubic root of 53728785 is about 377.3424572503.

The spelling of 53728785 in words is "fifty-three million, seven hundred twenty-eight thousand, seven hundred eighty-five".