638877062 has 8 divisors (see below), whose sum is σ = 969861816. Its totient is φ = 315589792.

The previous prime is 638877059. The next prime is 638877067. The reversal of 638877062 is 260778836.

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 = 638876998 and 638877016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638877067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1924163 + ... + 1924494.

It is an arithmetic number, because the mean of its divisors is an integer number (121232727).

Almost surely, 2^638877062 is an apocalyptic number.

638877062 is a deficient number, since it is larger than the sum of its proper divisors (330984754).

638877062 is a wasteful number, since it uses less digits than its factorization.

638877062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3848742.

The product of its (nonzero) digits is 677376, while the sum is 47.

The square root of 638877062 is about 25276.0175265013. The cubic root of 638877062 is about 861.2695608208.

The spelling of 638877062 in words is "six hundred thirty-eight million, eight hundred seventy-seven thousand, sixty-two".