638053216 has 12 divisors (see below), whose sum is σ = 1256167332. Its totient is φ = 319026592.

The previous prime is 638053211. The next prime is 638053243. The reversal of 638053216 is 612350836.

It is a super-2 number, since 2×638053216² = 814223812895885312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638053211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9969550 + ... + 9969613.

It is an arithmetic number, because the mean of its divisors is an integer number (104680611).

Almost surely, 2^638053216 is an apocalyptic number.

It is an amenable number.

638053216 is a deficient number, since it is larger than the sum of its proper divisors (618114116).

638053216 is a wasteful number, since it uses less digits than its factorization.

638053216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19939173 (or 19939165 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 638053216 is about 25259.7152794722. The cubic root of 638053216 is about 860.8991929058.

The spelling of 638053216 in words is "six hundred thirty-eight million, fifty-three thousand, two hundred sixteen".