538399216 has 30 divisors (see below), whose sum is σ = 1068030600. Its totient is φ = 262924704.

The previous prime is 538399187. The next prime is 538399229. The reversal of 538399216 is 612993835.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20485 + ... + 38683.

It is an arithmetic number, because the mean of its divisors is an integer number (35601020).

Almost surely, 2^538399216 is an apocalyptic number.

It is an amenable number.

538399216 is a deficient number, since it is larger than the sum of its proper divisors (529631384).

538399216 is a wasteful number, since it uses less digits than its factorization.

538399216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18293 (or 18244 counting only the distinct ones).

The product of its digits is 349920, while the sum is 46.

The square root of 538399216 is about 23203.4311255900. The cubic root of 538399216 is about 813.5198225655.

The spelling of 538399216 in words is "five hundred thirty-eight million, three hundred ninety-nine thousand, two hundred sixteen".