538563840 has 144 divisors (see below), whose sum is σ = 1734129600. Its totient is φ = 142442496.

The previous prime is 538563833. The next prime is 538563869. The reversal of 538563840 is 48365835.

538563840 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 538563792 and 538563801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 533256 + ... + 534264.

Almost surely, 2^538563840 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 538563840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (867064800).

538563840 is an abundant number, since it is smaller than the sum of its proper divisors (1195565760).

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

538563840 is a wasteful number, since it uses less digits than its factorization.

538563840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172 (or 1158 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The square root of 538563840 is about 23206.9782608594. The cubic root of 538563840 is about 813.6027295954.

The spelling of 538563840 in words is "five hundred thirty-eight million, five hundred sixty-three thousand, eight hundred forty".