38635818 has 32 divisors (see below), whose sum is σ = 84469056. Its totient is φ = 11708928.

The previous prime is 38635789. The next prime is 38635823. The reversal of 38635818 is 81853683.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 38635818.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1530 + ... + 8922.

It is an arithmetic number, because the mean of its divisors is an integer number (2639658).

Almost surely, 2^38635818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38635818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42234528).

38635818 is an abundant number, since it is smaller than the sum of its proper divisors (45833238).

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

38635818 is a wasteful number, since it uses less digits than its factorization.

38635818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7478.

The product of its digits is 138240, while the sum is 42.

The square root of 38635818 is about 6215.7717139548. The cubic root of 38635818 is about 338.0622704266.

The spelling of 38635818 in words is "thirty-eight million, six hundred thirty-five thousand, eight hundred eighteen".