638336374 has 16 divisors (see below), whose sum is σ = 1031577120. Its totient is φ = 294497280.

The previous prime is 638336359. The next prime is 638336381. The reversal of 638336374 is 473633836.

638336374 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 638336374.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113767 + ... + 119245.

It is an arithmetic number, because the mean of its divisors is an integer number (64473570).

Almost surely, 2^638336374 is an apocalyptic number.

638336374 is a deficient number, since it is larger than the sum of its proper divisors (393240746).

638336374 is a wasteful number, since it uses less digits than its factorization.

638336374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9975.

The product of its digits is 653184, while the sum is 43.

The square root of 638336374 is about 25265.3195903001. The cubic root of 638336374 is about 861.0265252536.

It can be divided in two parts, 63833 and 6374, that added together give a palindrome (70207).

The spelling of 638336374 in words is "six hundred thirty-eight million, three hundred thirty-six thousand, three hundred seventy-four".