53643384 has 80 divisors (see below), whose sum is σ = 158195400. Its totient is φ = 16936128.

The previous prime is 53643371. The next prime is 53643389. The reversal of 53643384 is 48334635.

53643384 is a `hidden beast` number, since 5 + 3 + 643 + 3 + 8 + 4 = 666.

It is a super-2 number, since 2×53643384² = 5755225293942912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53643389) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 10134 + ... + 14490.

Almost surely, 2^53643384 is an apocalyptic number.

53643384 is a gapful number since it is divisible by the number (54) 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 53643384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79097700).

53643384 is an abundant number, since it is smaller than the sum of its proper divisors (104552016).

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

53643384 is a wasteful number, since it uses less digits than its factorization.

53643384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4394 (or 4381 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 53643384 is about 7324.1643891983. The cubic root of 53643384 is about 377.1424247339.

The spelling of 53643384 in words is "fifty-three million, six hundred forty-three thousand, three hundred eighty-four".