3858385778 has 8 divisors (see below), whose sum is σ = 6232777068. Its totient is φ = 1780793424.

The previous prime is 3858385777. The next prime is 3858385787. The reversal of 3858385778 is 8775838583.

It can be written as a sum of positive squares in 2 ways, for example, as 3255044809 + 603340969 = 57053^2 + 24563^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 3858385778.

It is not an unprimeable number, because it can be changed into a prime (3858385777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74199701 + ... + 74199752.

Almost surely, 2^3858385778 is an apocalyptic number.

3858385778 is a deficient number, since it is larger than the sum of its proper divisors (2374391290).

3858385778 is a wasteful number, since it uses less digits than its factorization.

3858385778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148399468.

The product of its digits is 45158400, while the sum is 62.

The square root of 3858385778 is about 62115.9059983834. The cubic root of 3858385778 is about 1568.4423104996.

The spelling of 3858385778 in words is "three billion, eight hundred fifty-eight million, three hundred eighty-five thousand, seven hundred seventy-eight".