638820627 has 8 divisors (see below), whose sum is σ = 879237120. Its totient is φ = 412142280.

The previous prime is 638820617. The next prime is 638820647. The reversal of 638820627 is 726028836.

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

It is not a de Polignac number, because 638820627 - 2¹⁰ = 638819603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (638820617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3434427 + ... + 3434612.

It is an arithmetic number, because the mean of its divisors is an integer number (109904640).

Almost surely, 2^638820627 is an apocalyptic number.

638820627 is a deficient number, since it is larger than the sum of its proper divisors (240416493).

638820627 is a wasteful number, since it uses less digits than its factorization.

638820627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6869073.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 638820627 is about 25274.9011274031. The cubic root of 638820627 is about 861.2442000841.

The spelling of 638820627 in words is "six hundred thirty-eight million, eight hundred twenty thousand, six hundred twenty-seven".