38995866 has 144 divisors (see below), whose sum is σ = 112039200. Its totient is φ = 9688896.

The previous prime is 38995849. The next prime is 38995867. The reversal of 38995866 is 66859983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38995867) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 217765 + ... + 217943.

It is an arithmetic number, because the mean of its divisors is an integer number (778050).

Almost surely, 2^38995866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38995866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56019600).

38995866 is an abundant number, since it is smaller than the sum of its proper divisors (73043334).

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

38995866 is a wasteful number, since it uses less digits than its factorization.

38995866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 223 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 38995866 is about 6244.6670047329. The cubic root of 38995866 is about 339.1091615976.

The spelling of 38995866 in words is "thirty-eight million, nine hundred ninety-five thousand, eight hundred sixty-six".