53885440 has 160 divisors (see below), whose sum is σ = 153990144. Its totient is φ = 17694720.

The previous prime is 53885437. The next prime is 53885443. The reversal of 53885440 is 4458835.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (53885437) and next prime (53885443).

It is a tau number, because it is divible by the number of its divisors (160).

It is a self number, because there is not a number n which added to its sum of digits gives 53885440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53885443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 555472 + ... + 555568.

Almost surely, 2^53885440 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 53885440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76995072).

53885440 is an abundant number, since it is smaller than the sum of its proper divisors (100104704).

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

53885440 is an equidigital number, since it uses as much as digits as its factorization.

53885440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 37.

The square root of 53885440 is about 7340.6702691239. The cubic root of 53885440 is about 377.7088358110.

The spelling of 53885440 in words is "fifty-three million, eight hundred eighty-five thousand, four hundred forty".