38635638 has 8 divisors (see below), whose sum is σ = 77271288. Its totient is φ = 12878544.

The previous prime is 38635637. The next prime is 38635673. The reversal of 38635638 is 83653683.

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

38635638 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 38635638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38635637) 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, 3219631 + ... + 3219642.

It is an arithmetic number, because the mean of its divisors is an integer number (9658911).

Almost surely, 2^38635638 is an apocalyptic number.

38635638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38635638 is a wasteful number, since it uses less digits than its factorization.

38635638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6439278.

The product of its digits is 311040, while the sum is 42.

The square root of 38635638 is about 6215.7572346416. The cubic root of 38635638 is about 338.0617454276.

The spelling of 38635638 in words is "thirty-eight million, six hundred thirty-five thousand, six hundred thirty-eight".