53404320 has 192 divisors, whose sum is σ = 180182016. Its totient is φ = 13271040.

The previous prime is 53404303. The next prime is 53404339. The reversal of 53404320 is 2340435.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 550512 + ... + 550608.

It is an arithmetic number, because the mean of its divisors is an integer number (938448).

Almost surely, 2^53404320 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 53404320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90091008).

53404320 is an abundant number, since it is smaller than the sum of its proper divisors (126777696).

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

53404320 is a wasteful number, since it uses less digits than its factorization.

53404320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 53404320 is about 7307.8259420980. The cubic root of 53404320 is about 376.5813400410.

Adding to 53404320 its reverse (2340435), we get a palindrome (55744755).

The spelling of 53404320 in words is "fifty-three million, four hundred four thousand, three hundred twenty".