38805645 has 32 divisors (see below), whose sum is σ = 67875840. Its totient is φ = 18846720.

The previous prime is 38805631. The next prime is 38805649. The reversal of 38805645 is 54650883.

It is a happy number.

It is not a de Polignac number, because 38805645 - 2⁷ = 38805517 is a prime.

It is a super-3 number, since 3×38805645³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38805649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5451 + ... + 10359.

It is an arithmetic number, because the mean of its divisors is an integer number (2121120).

Almost surely, 2^38805645 is an apocalyptic number.

It is an amenable number.

38805645 is a deficient number, since it is larger than the sum of its proper divisors (29070195).

38805645 is a wasteful number, since it uses less digits than its factorization.

38805645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4965.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 38805645 is about 6229.4177095456. The cubic root of 38805645 is about 338.5568735270.

The spelling of 38805645 in words is "thirty-eight million, eight hundred five thousand, six hundred forty-five".