52785420 has 72 divisors (see below), whose sum is σ = 156051504. Its totient is φ = 13329792.

The previous prime is 52785419. The next prime is 52785433. The reversal of 52785420 is 2458725.

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, 20442 + ... + 22878.

It is an arithmetic number, because the mean of its divisors is an integer number (2167382).

Almost surely, 2^52785420 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 52785420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78025752).

52785420 is an abundant number, since it is smaller than the sum of its proper divisors (103266084).

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

52785420 is a wasteful number, since it uses less digits than its factorization.

52785420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2487 (or 2466 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 52785420 is about 7265.3575273348. The cubic root of 52785420 is about 375.1209565367.

The spelling of 52785420 in words is "fifty-two million, seven hundred eighty-five thousand, four hundred twenty".