38643936 has 24 divisors (see below), whose sum is σ = 101440584. Its totient is φ = 12881280.

The previous prime is 38643931. The next prime is 38643953. The reversal of 38643936 is 63934683.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38643931) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 201175 + ... + 201366.

It is an arithmetic number, because the mean of its divisors is an integer number (4226691).

Almost surely, 2^38643936 is an apocalyptic number.

It is an amenable number.

38643936 is an abundant number, since it is smaller than the sum of its proper divisors (62796648).

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

38643936 is a wasteful number, since it uses less digits than its factorization.

38643936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402554 (or 402546 counting only the distinct ones).

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

The square root of 38643936 is about 6216.4246959165. The cubic root of 38643936 is about 338.0859461889.

The spelling of 38643936 in words is "thirty-eight million, six hundred forty-three thousand, nine hundred thirty-six".