38820865 has 8 divisors (see below), whose sum is σ = 47046888. Its totient is φ = 30748800.

The previous prime is 38820853. The next prime is 38820869. The reversal of 38820865 is 56802883.

It can be written as a sum of positive squares in 4 ways, for example, as 26204161 + 12616704 = 5119^2 + 3552^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 38820865 - 2¹¹ = 38818817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38820869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37932 + ... + 38941.

It is an arithmetic number, because the mean of its divisors is an integer number (5880861).

Almost surely, 2^38820865 is an apocalyptic number.

It is an amenable number.

38820865 is a deficient number, since it is larger than the sum of its proper divisors (8226023).

38820865 is a wasteful number, since it uses less digits than its factorization.

38820865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76979.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 38820865 is about 6230.6392127935. The cubic root of 38820865 is about 338.6011296492.

The spelling of 38820865 in words is "thirty-eight million, eight hundred twenty thousand, eight hundred sixty-five".