538120816 has 40 divisors (see below), whose sum is σ = 1079395200. Its totient is φ = 259618560.

The previous prime is 538120799. The next prime is 538120871. The reversal of 538120816 is 618021835.

It is a super-2 number, since 2×538120816² = 579148025225011712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191550 + ... + 194338.

It is an arithmetic number, because the mean of its divisors is an integer number (26984880).

Almost surely, 2^538120816 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 538120816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (539697600).

538120816 is an abundant number, since it is smaller than the sum of its proper divisors (541274384).

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

538120816 is a wasteful number, since it uses less digits than its factorization.

538120816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3217 (or 3211 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 538120816 is about 23197.4312371004. The cubic root of 538120816 is about 813.3795778298.

The spelling of 538120816 in words is "five hundred thirty-eight million, one hundred twenty thousand, eight hundred sixteen".