53643420 has 72 divisors (see below), whose sum is σ = 165818016. Its totient is φ = 14032512.

The previous prime is 53643413. The next prime is 53643493. The reversal of 53643420 is 2434635.

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, 6729 + ... + 12351.

It is an arithmetic number, because the mean of its divisors is an integer number (2303028).

Almost surely, 2^53643420 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 53643420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82909008).

53643420 is an abundant number, since it is smaller than the sum of its proper divisors (112174596).

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

53643420 is a wasteful number, since it uses less digits than its factorization.

53643420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5691 (or 5686 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 53643420 is about 7324.1668468161. The cubic root of 53643420 is about 377.1425091004.

It can be divided in two parts, 536 and 43420, that added together give a triangular number (43956 = T₂₉₆).

The spelling of 53643420 in words is "fifty-three million, six hundred forty-three thousand, four hundred twenty".