52420816 has 40 divisors (see below), whose sum is σ = 118278144. Its totient is φ = 22039680.

The previous prime is 52420811. The next prime is 52420817. The reversal of 52420816 is 61802425.

52420816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52420811) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1521 + ... + 10351.

Almost surely, 2^52420816 is an apocalyptic number.

52420816 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52420816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59139072).

52420816 is an abundant number, since it is smaller than the sum of its proper divisors (65857328).

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

52420816 is a wasteful number, since it uses less digits than its factorization.

52420816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8899 (or 8893 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 52420816 is about 7240.2220960410. Note that the first 3 decimals coincide. The cubic root of 52420816 is about 374.2552710261.

The spelling of 52420816 in words is "fifty-two million, four hundred twenty thousand, eight hundred sixteen".