638376086 has 8 divisors (see below), whose sum is σ = 999197424. Its totient is φ = 305310280.

The previous prime is 638376083. The next prime is 638376091. The reversal of 638376086 is 680673836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 638376086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638376083) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6938825 + ... + 6938916.

It is an arithmetic number, because the mean of its divisors is an integer number (124899678).

Almost surely, 2^638376086 is an apocalyptic number.

638376086 is a deficient number, since it is larger than the sum of its proper divisors (360821338).

638376086 is a wasteful number, since it uses less digits than its factorization.

638376086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13877766.

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 638376086 is about 25266.1054774969. The cubic root of 638376086 is about 861.0443801954.

The spelling of 638376086 in words is "six hundred thirty-eight million, three hundred seventy-six thousand, eighty-six".