38878765 has 4 divisors (see below), whose sum is σ = 46654524. Its totient is φ = 31103008.

The previous prime is 38878759. The next prime is 38878781. The reversal of 38878765 is 56787883.

38878765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30503529 + 8375236 = 5523^2 + 2894^2 .

It is a cyclic number.

It is not a de Polignac number, because 38878765 - 2⁹ = 38878253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3887872 + ... + 3887881.

It is an arithmetic number, because the mean of its divisors is an integer number (11663631).

Almost surely, 2^38878765 is an apocalyptic number.

It is an amenable number.

38878765 is a deficient number, since it is larger than the sum of its proper divisors (7775759).

38878765 is an equidigital number, since it uses as much as digits as its factorization.

38878765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7775758.

The product of its digits is 2257920, while the sum is 52.

The square root of 38878765 is about 6235.2838748529. The cubic root of 38878765 is about 338.7693833854.

The spelling of 38878765 in words is "thirty-eight million, eight hundred seventy-eight thousand, seven hundred sixty-five".