638038354 has 16 divisors (see below), whose sum is σ = 1051231680. Its totient is φ = 289087920.

The previous prime is 638038337. The next prime is 638038361. The reversal of 638038354 is 453830836.

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 7 ways as a sum of consecutive naturals, for example, 364137 + ... + 365884.

It is an arithmetic number, because the mean of its divisors is an integer number (65701980).

Almost surely, 2^638038354 is an apocalyptic number.

638038354 is a deficient number, since it is larger than the sum of its proper divisors (413193326).

638038354 is a wasteful number, since it uses less digits than its factorization.

638038354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730065.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 638038354 is about 25259.4210939206. The cubic root of 638038354 is about 860.8925086237.

The spelling of 638038354 in words is "six hundred thirty-eight million, thirty-eight thousand, three hundred fifty-four".