638147050 has 24 divisors (see below), whose sum is σ = 1190170476. Its totient is φ = 254567040.

The previous prime is 638147039. The next prime is 638147051. The reversal of 638147050 is 50741836.

It can be written as a sum of positive squares in 6 ways, for example, as 425308129 + 212838921 = 20623^2 + 14589^2 .

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 638146997 and 638147015.

It is not an unprimeable number, because it can be changed into a prime (638147051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1542 + ... + 35758.

Almost surely, 2^638147050 is an apocalyptic number.

638147050 is a deficient number, since it is larger than the sum of its proper divisors (552023426).

638147050 is a wasteful number, since it uses less digits than its factorization.

638147050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34602 (or 34597 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 638147050 is about 25261.5725955452. The cubic root of 638147050 is about 860.9413929675.

Adding to 638147050 its reverse (50741836), we get a palindrome (688888886).

The spelling of 638147050 in words is "six hundred thirty-eight million, one hundred forty-seven thousand, fifty".