3857885993 has 8 divisors (see below), whose sum is σ = 4266934728. Its totient is φ = 3464878464.

The previous prime is 3857885959. The next prime is 3857886001. The reversal of 3857885993 is 3995887583.

It can be written as a sum of positive squares in 4 ways, for example, as 1607047744 + 2250838249 = 40088^2 + 47443^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 3857885993 - 2¹⁶ = 3857820457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3857885593) 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, 4009796 + ... + 4010757.

It is an arithmetic number, because the mean of its divisors is an integer number (533366841).

Almost surely, 2^3857885993 is an apocalyptic number.

It is an amenable number.

3857885993 is a deficient number, since it is larger than the sum of its proper divisors (409048735).

3857885993 is a wasteful number, since it uses less digits than its factorization.

3857885993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8020603.

The product of its digits is 65318400, while the sum is 65.

The square root of 3857885993 is about 62111.8828647144. The cubic root of 3857885993 is about 1568.3745863413.

The spelling of 3857885993 in words is "three billion, eight hundred fifty-seven million, eight hundred eighty-five thousand, nine hundred ninety-three".