538635780 has 144 divisors (see below), whose sum is σ = 1688581440. Its totient is φ = 138910464.

The previous prime is 538635707. The next prime is 538635791. The reversal of 538635780 is 87536835.

538635780 is a `hidden beast` number, since 5 + 3 + 8 + 635 + 7 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 711162 + ... + 711918.

It is an arithmetic number, because the mean of its divisors is an integer number (11726260).

Almost surely, 2^538635780 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 538635780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (844290720).

538635780 is an abundant number, since it is smaller than the sum of its proper divisors (1149945660).

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

538635780 is a wasteful number, since it uses less digits than its factorization.

538635780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898 (or 893 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The square root of 538635780 is about 23208.5281739278. The cubic root of 538635780 is about 813.6389543164.

The spelling of 538635780 in words is "five hundred thirty-eight million, six hundred thirty-five thousand, seven hundred eighty".