538187220 has 96 divisors (see below), whose sum is σ = 1732147200. Its totient is φ = 138563712.

The previous prime is 538187219. The next prime is 538187239. The reversal of 538187220 is 22781835.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent 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, 1524 + ... + 32843.

It is an arithmetic number, because the mean of its divisors is an integer number (18043200).

Almost surely, 2^538187220 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 538187220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (866073600).

538187220 is an abundant number, since it is smaller than the sum of its proper divisors (1193959980).

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

538187220 is a wasteful number, since it uses less digits than its factorization.

538187220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34414 (or 34406 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 538187220 is about 23198.8624721127. The cubic root of 538187220 is about 813.4130334123.

The spelling of 538187220 in words is "five hundred thirty-eight million, one hundred eighty-seven thousand, two hundred twenty".