53550640 has 160 divisors (see below), whose sum is σ = 151990272. Its totient is φ = 17280000.

The previous prime is 53550631. The next prime is 53550641. The reversal of 53550640 is 4605535.

It is a junction number, because it is equal to n+sod(n) for n = 53550599 and 53550608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53550641) 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 31 ways as a sum of consecutive naturals, for example, 354565 + ... + 354715.

Almost surely, 2^53550640 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 53550640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75995136).

53550640 is an abundant number, since it is smaller than the sum of its proper divisors (98439632).

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

53550640 is a wasteful number, since it uses less digits than its factorization.

53550640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 53550640 is about 7317.8302795296. The cubic root of 53550640 is about 376.9249522862.

The spelling of 53550640 in words is "fifty-three million, five hundred fifty thousand, six hundred forty".