3891012 has 12 divisors (see below), whose sum is σ = 9079056. Its totient is φ = 1297000.

The previous prime is 3890981. The next prime is 3891037. The reversal of 3891012 is 2101983.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

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, 162114 + ... + 162137.

It is an arithmetic number, because the mean of its divisors is an integer number (756588).

Almost surely, 2^3891012 is an apocalyptic number.

It is an amenable number.

3891012 is an abundant number, since it is smaller than the sum of its proper divisors (5188044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3891012 is a wasteful number, since it uses less digits than its factorization.

3891012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324258 (or 324256 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 3891012 is about 1972.5648278320. The cubic root of 3891012 is about 157.2850784857.

Adding to 3891012 its reverse (2101983), we get a palindrome (5992995).

The spelling of 3891012 in words is "three million, eight hundred ninety-one thousand, twelve".