638750695 has 8 divisors (see below), whose sum is σ = 836182800. Its totient is φ = 464545920.

The previous prime is 638750621. The next prime is 638750699. The reversal of 638750695 is 596057836.

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

It is not a de Polignac number, because 638750695 - 2¹¹ = 638748647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638750699) 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, 5806770 + ... + 5806879.

It is an arithmetic number, because the mean of its divisors is an integer number (104522850).

Almost surely, 2^638750695 is an apocalyptic number.

638750695 is a deficient number, since it is larger than the sum of its proper divisors (197432105).

638750695 is a wasteful number, since it uses less digits than its factorization.

638750695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11613665.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The square root of 638750695 is about 25273.5176617740. The cubic root of 638750695 is about 861.2127719989.

The spelling of 638750695 in words is "six hundred thirty-eight million, seven hundred fifty thousand, six hundred ninety-five".