638064070 has 16 divisors (see below), whose sum is σ = 1312589088. Its totient is φ = 218764800.

The previous prime is 638064067. The next prime is 638064079. The reversal of 638064070 is 70460836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638064079) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4557531 + ... + 4557670.

It is an arithmetic number, because the mean of its divisors is an integer number (82036818).

Almost surely, 2^638064070 is an apocalyptic number.

638064070 is an abundant number, since it is smaller than the sum of its proper divisors (674525018).

638064070 is a wasteful number, since it uses less digits than its factorization.

638064070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9115215.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 638064070 is about 25259.9301265859. The cubic root of 638064070 is about 860.9040744980.

It can be divided in two parts, 63806 and 4070, that added together give a palindrome (67876).

The spelling of 638064070 in words is "six hundred thirty-eight million, sixty-four thousand, seventy".