638244232 has 16 divisors (see below), whose sum is σ = 1219288140. Its totient is φ = 313100736.

The previous prime is 638244203. The next prime is 638244251. The reversal of 638244232 is 232442836.

It can be written as a sum of positive squares in 2 ways, for example, as 593701956 + 44542276 = 24366^2 + 6674^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752223 + ... + 753070.

Almost surely, 2^638244232 is an apocalyptic number.

It is an amenable number.

638244232 is a deficient number, since it is larger than the sum of its proper divisors (581043908).

638244232 is a wasteful number, since it uses less digits than its factorization.

638244232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505352 (or 1505348 counting only the distinct ones).

The product of its digits is 55296, while the sum is 34.

The square root of 638244232 is about 25263.4960367721. The cubic root of 638244232 is about 860.9850943681.

The spelling of 638244232 in words is "six hundred thirty-eight million, two hundred forty-four thousand, two hundred thirty-two".