3685875381 has 8 divisors (see below), whose sum is σ = 5460556160. Its totient is φ = 2457250236.

The previous prime is 3685875337. The next prime is 3685875397. The reversal of 3685875381 is 1835785863.

3685875381 is a `hidden beast` number, since 3 + 6 + 8 + 587 + 53 + 8 + 1 = 666.

It is not a de Polignac number, because 3685875381 - 2⁷ = 3685875253 is a prime.

It is a super-2 number, since 2×3685875381² = 27171354648523790322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3685875311) 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, 68256925 + ... + 68256978.

It is an arithmetic number, because the mean of its divisors is an integer number (682569520).

Almost surely, 2^3685875381 is an apocalyptic number.

It is an amenable number.

3685875381 is a deficient number, since it is larger than the sum of its proper divisors (1774680779).

3685875381 is a wasteful number, since it uses less digits than its factorization.

3685875381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136513912 (or 136513906 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The square root of 3685875381 is about 60711.4106325985. The cubic root of 3685875381 is about 1544.7097314996.

The spelling of 3685875381 in words is "three billion, six hundred eighty-five million, eight hundred seventy-five thousand, three hundred eighty-one".