38394636 has 144 divisors (see below), whose sum is σ = 115831296. Its totient is φ = 9816576.

The previous prime is 38394623. The next prime is 38394667. The reversal of 38394636 is 63649383.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 229825 + ... + 229991.

It is an arithmetic number, because the mean of its divisors is an integer number (804384).

Almost surely, 2^38394636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38394636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57915648).

38394636 is an abundant number, since it is smaller than the sum of its proper divisors (77436660).

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

38394636 is a wasteful number, since it uses less digits than its factorization.

38394636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 219 counting only the distinct ones).

The product of its digits is 279936, while the sum is 42.

The square root of 38394636 is about 6196.3405329275. The cubic root of 38394636 is about 337.3573564558.

The spelling of 38394636 in words is "thirty-eight million, three hundred ninety-four thousand, six hundred thirty-six".