38643040 has 48 divisors (see below), whose sum is σ = 96671232. Its totient is φ = 14546944.

The previous prime is 38643037. The next prime is 38643047. The reversal of 38643040 is 4034683.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38643047) 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 7 ways as a sum of consecutive naturals, for example, 4384 + ... + 9823.

It is an arithmetic number, because the mean of its divisors is an integer number (2013984).

Almost surely, 2^38643040 is an apocalyptic number.

It is an amenable number.

38643040 is an abundant number, since it is smaller than the sum of its proper divisors (58028192).

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

38643040 is a wasteful number, since it uses less digits than its factorization.

38643040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14239 (or 14231 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 38643040 is about 6216.3526283505. The cubic root of 38643040 is about 338.0833332101.

The spelling of 38643040 in words is "thirty-eight million, six hundred forty-three thousand, forty".