638200070 has 16 divisors (see below), whose sum is σ = 1150003008. Its totient is φ = 255003840.

The previous prime is 638200039. The next prime is 638200093. The reversal of 638200070 is 70002836.

It is a Curzon number.

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, 24686 + ... + 43425.

It is an arithmetic number, because the mean of its divisors is an integer number (71875188).

Almost surely, 2^638200070 is an apocalyptic number.

638200070 is a deficient number, since it is larger than the sum of its proper divisors (511802938).

638200070 is a wasteful number, since it uses less digits than its factorization.

638200070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69055.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 638200070 is about 25262.6219937678. The cubic root of 638200070 is about 860.9652358777.

The spelling of 638200070 in words is "six hundred thirty-eight million, two hundred thousand, seventy".