53489920 has 144 divisors (see below), whose sum is σ = 145696320. Its totient is φ = 18636800.

The previous prime is 53489861. The next prime is 53489941. The reversal of 53489920 is 2998435.

It is a happy number.

It is a super-2 number, since 2×53489920² = 5722343083212800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 408255 + ... + 408385.

It is an arithmetic number, because the mean of its divisors is an integer number (1011780).

Almost surely, 2^53489920 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 53489920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72848160).

53489920 is an abundant number, since it is smaller than the sum of its proper divisors (92206400).

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

53489920 is a wasteful number, since it uses less digits than its factorization.

53489920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 53489920 is about 7313.6803320900. The cubic root of 53489920 is about 376.7824358514.

The spelling of 53489920 in words is "fifty-three million, four hundred eighty-nine thousand, nine hundred twenty".