639148 has 6 divisors (see below), whose sum is σ = 1118516. Its totient is φ = 319572.

The previous prime is 639143. The next prime is 639151. The reversal of 639148 is 841936.

It is not an unprimeable number, because it can be changed into a prime (639143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79890 + ... + 79897.

2⁶³⁹¹⁴⁸ is an apocalyptic number.

It is an amenable number.

639148 is a deficient number, since it is larger than the sum of its proper divisors (479368).

639148 is a wasteful number, since it uses less digits than its factorization.

639148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159791 (or 159789 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 639148 is about 799.4673226593. The cubic root of 639148 is about 86.1391294034.

It can be divided in two parts, 639 and 148, that added together give a palindrome (787).

The spelling of 639148 in words is "six hundred thirty-nine thousand, one hundred forty-eight".