638275366 has 8 divisors (see below), whose sum is σ = 971703000. Its totient is φ = 314374368.

The previous prime is 638275357. The next prime is 638275373. The reversal of 638275366 is 663572836.

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

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, 2381491 + ... + 2381758.

It is an arithmetic number, because the mean of its divisors is an integer number (121462875).

Almost surely, 2^638275366 is an apocalyptic number.

638275366 is a deficient number, since it is larger than the sum of its proper divisors (333427634).

638275366 is a wasteful number, since it uses less digits than its factorization.

638275366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4763318.

The product of its digits is 1088640, while the sum is 46.

The square root of 638275366 is about 25264.1122147603. The cubic root of 638275366 is about 860.9990939588. Note that the first 3 decimals are identical.

The spelling of 638275366 in words is "six hundred thirty-eight million, two hundred seventy-five thousand, three hundred sixty-six".