538022556 has 72 divisors (see below), whose sum is σ = 1392968304. Its totient is φ = 175046400.

The previous prime is 538022549. The next prime is 538022581. The reversal of 538022556 is 655220835.

It is a happy number.

538022556 is a `hidden beast` number, since 5 + 3 + 80 + 22 + 556 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 538022556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 264415 + ... + 266441.

It is an arithmetic number, because the mean of its divisors is an integer number (19346782).

Almost surely, 2^538022556 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 538022556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (696484152).

538022556 is an abundant number, since it is smaller than the sum of its proper divisors (854945748).

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

538022556 is a wasteful number, since it uses less digits than its factorization.

538022556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211 (or 2206 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 538022556 is about 23195.3132334961. The cubic root of 538022556 is about 813.3300675464.

The spelling of 538022556 in words is "five hundred thirty-eight million, twenty-two thousand, five hundred fifty-six".