638062272 has 70 divisors (see below), whose sum is σ = 1891431828. Its totient is φ = 212685696.

The previous prime is 638062247. The next prime is 638062273. The reversal of 638062272 is 272260836.

638062272 is a `hidden beast` number, since 6 + 380 + 6 + 2 + 272 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (638062273) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 56358 + ... + 66725.

Almost surely, 2^638062272 is an apocalyptic number.

It is an amenable number.

638062272 is an abundant number, since it is smaller than the sum of its proper divisors (1253369556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

638062272 is a wasteful number, since it uses less digits than its factorization.

638062272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123107 (or 123088 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 638062272 is about 25259.8945365969. The cubic root of 638062272 is about 860.9032658504.

The spelling of 638062272 in words is "six hundred thirty-eight million, sixty-two thousand, two hundred seventy-two".