3868991 has 12 divisors (see below), whose sum is σ = 4697712. Its totient is φ = 3171168.

The previous prime is 3868987. The next prime is 3868999. The reversal of 3868991 is 1998683.

It is not a de Polignac number, because 3868991 - 2² = 3868987 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3868999) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 590 + ... + 2843.

It is an arithmetic number, because the mean of its divisors is an integer number (391476).

Almost surely, 2^3868991 is an apocalyptic number.

3868991 is a deficient number, since it is larger than the sum of its proper divisors (828721).

3868991 is a wasteful number, since it uses less digits than its factorization.

3868991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3470 (or 3463 counting only the distinct ones).

The product of its digits is 93312, while the sum is 44.

The square root of 3868991 is about 1966.9750888102. The cubic root of 3868991 is about 156.9878011266.

The spelling of 3868991 in words is "three million, eight hundred sixty-eight thousand, nine hundred ninety-one".