206648638 has 8 divisors (see below), whose sum is σ = 354254832. Its totient is φ = 88563696.

The previous prime is 206648623. The next prime is 206648641. The reversal of 206648638 is 836846602.

206648638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 206648594 and 206648603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7380295 + ... + 7380322.

It is an arithmetic number, because the mean of its divisors is an integer number (44281854).

Almost surely, 2^206648638 is an apocalyptic number.

206648638 is a deficient number, since it is larger than the sum of its proper divisors (147606194).

206648638 is a wasteful number, since it uses less digits than its factorization.

206648638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14760626.

The product of its (nonzero) digits is 331776, while the sum is 43.

The square root of 206648638 is about 14375.2787103416. The cubic root of 206648638 is about 591.2132822739.

The spelling of 206648638 in words is "two hundred six million, six hundred forty-eight thousand, six hundred thirty-eight".