638125276 has 12 divisors (see below), whose sum is σ = 1117305280. Its totient is φ = 318895200.

The previous prime is 638125261. The next prime is 638125291. The reversal of 638125276 is 672521836.

It is an interprime number because it is at equal distance from previous prime (638125261) and next prime (638125291).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33081 + ... + 48688.

Almost surely, 2^638125276 is an apocalyptic number.

It is an amenable number.

638125276 is a deficient number, since it is larger than the sum of its proper divisors (479180004).

638125276 is a wasteful number, since it uses less digits than its factorization.

638125276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83724 (or 83722 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 638125276 is about 25261.1416210748. The cubic root of 638125276 is about 860.9316008926.

It can be divided in two parts, 638125 and 276, that added together give a square (638401 = 799²).

The spelling of 638125276 in words is "six hundred thirty-eight million, one hundred twenty-five thousand, two hundred seventy-six".