638608362 has 32 divisors (see below), whose sum is σ = 1510012800. Its totient is φ = 176167488.

The previous prime is 638608357. The next prime is 638608379. The reversal of 638608362 is 263806836.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260937 + ... + 263372.

It is an arithmetic number, because the mean of its divisors is an integer number (47187900).

Almost surely, 2^638608362 is an apocalyptic number.

638608362 is an abundant number, since it is smaller than the sum of its proper divisors (871404438).

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

638608362 is a wasteful number, since it uses less digits than its factorization.

638608362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524350.

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 638608362 is about 25270.7016523087. The cubic root of 638608362 is about 861.1487991509.

The spelling of 638608362 in words is "six hundred thirty-eight million, six hundred eight thousand, three hundred sixty-two".